CN114881577A - Purchasing decision method and system for dynamically sensing material demand change - Google Patents

Purchasing decision method and system for dynamically sensing material demand change Download PDF

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CN114881577A
CN114881577A CN202210790360.0A CN202210790360A CN114881577A CN 114881577 A CN114881577 A CN 114881577A CN 202210790360 A CN202210790360 A CN 202210790360A CN 114881577 A CN114881577 A CN 114881577A
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CN114881577B (en
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吴建锋
葛军萍
刘畅
马宇辉
赵欣
谭云燕
楼伟杰
王悦
邱阳
胡恺锐
王婧
吴健超
周耀
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State Grid Zhejiang Electric Power Co Ltd
Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Abstract

The invention discloses a purchasing decision method and a purchasing decision system for dynamically sensing material demand change, which comprises the following steps: acquiring a project construction milestone plan and corresponding material demand information of a project bid plan task book and constructing a material supply user portrait; the purchasing decision terminal acquires the bidder information corresponding to the bidding terminal through the disappearing transmission protocol; predicting a productivity curve of a material supply user portrait on a time dimension and material transportation time by adopting a prophet model; performing fusion calculation based on the fixed material completion degree and the dynamic material completion degree to obtain a target purchasing user pre-selection table; grading the participation degree of each material supply user portrait in the target purchasing user preselection table to manufacture a material purchasing decision table; and sending the winning bid sub information of the project construction milestone plan corresponding to the material purchasing decision table to the bidding terminal through a loss transmission protocol. The proposal obviously improves the adhesion degree of the supply quality of the supplier materials and the project and ensures the fairness and the reliability of the bidding process.

Description

Purchasing decision method and system for dynamically sensing material demand change
Technical Field
The invention relates to the technical field of bidding and purchasing decision of power project materials, in particular to a purchasing decision method and a purchasing decision system capable of dynamically sensing material demand change.
Background
With the continuous deep promotion of intensive management of materials of national power grid companies, the requirement that a project purchasing plan is matched with the requirements of project materials is more and more emphasized; the material purchasing mode of the current power engineering project is solidified, purchasing arrangement is made according to the original material requirements, and the requirement change in the engineering project construction cannot be dynamically sensed. The existing material purchasing strategy mainly queries historical purchasing prices and project planning requirements in a material system of a power grid company and performs material purchasing and bidding according to manual experience, so that the development of project material purchasing and bidding plans is not closely linked with a material demand plan, a project investment plan and a project construction milestone plan, and the adhesion degree of the existing material purchasing strategy for adapting to the project material demands is not high.
In order to ensure that the project construction milestone plan is constructed as scheduled start construction, the material supply and the material demand corresponding to the project construction milestone plan need to be analyzed, and then a material purchasing strategy is customized; however, in the existing material bidding and purchasing schemes, the reference factors for assessing the qualification of the supplier are single, such as: the method is sensitive to the competitive price of the supplier, and the supply stability of the material supplier is lack of consideration, so that the hidden danger is buried for the stable supply of the materials when the future engineering project is implemented; the material purchasing strategy formulated by the traditional method ensures that the degree of adhesion between the qualification of the winning material supplier and the requirement of the project material is not high, and the privacy of the bidding information of each supplier in the bidding process cannot be guaranteed, thereby further burying potential safety hazards in the processes of opening bid, bidding, winning bid and the like of the project.
Disclosure of Invention
The invention aims to solve the problems that the adhesion degree of the existing material purchasing strategy and the project material requirement is not high and the privacy of bidding information transmission needs to be further enhanced, and provides a purchasing decision method and a system for dynamically sensing the material requirement change, wherein a purchasing decision terminal obtains the bidding sub-information of a supplier with bidding qualification privacy, performs qualification analysis through the purchasing decision terminal, and sequentially judges the matching degree of the supply qualification of the material supplier and the project construction milestone plan according to set conditions; and a material purchasing decision table is generated, and the bid-winning sub-information is generated according to the material purchasing decision table, so that each bid-winning unit can check the own bid-winning condition in sequence, information leakage is avoided, and the privacy of bidding information transmission is guaranteed.
In order to achieve the technical purpose, the invention provides a technical scheme that a purchasing decision method for dynamically sensing material demand change comprises the following steps:
s1, obtaining a project bid plan task book according to the material demand plan, the project investment plan and the project construction milestone plan;
s2, acquiring project construction milestone plans of project bid plan task books and corresponding material demand information, and constructing material supply user images according to material attributes; the material demand information comprises fixed material demand information and dynamic material demand information;
s3, the purchasing decision terminal acquires the bidder information corresponding to the bidding terminal through the ubiquitous transmission protocol;
s4, predicting the productivity of the material supply user portrait in the time dimension by adopting a prophet model to obtain a productivity curve, and acquiring material transportation time according to material supply and logistics information of each material supply user portrait;
s5, acquiring the fixed material completion degree and the dynamic material completion degree of the material supply user portrait relative to each project construction milestone plan; performing fusion calculation based on the fixed material completion degree and the dynamic material completion degree to obtain a target purchasing user pre-selection table;
s6, scoring the participation degree of each material supply user portrait in the target purchasing user preselection table, and selecting target recommending users in the target purchasing user preselection table corresponding to each project construction milestone plan in sequence to make a material purchasing decision table;
and S7, sending the bid winning sub-information of the project construction milestone plan corresponding to the material purchasing decision table to the bidding terminal through the loss transmission protocol.
In the scheme, in the early stage of the bid opening of a project, a project bid inviting plan task book needs to be made, so that a material demand plan, a project investment plan and a project construction milestone plan are adapted, and a project construction milestone plan, a material demand plan and a bid opening time covered by each bid opening are made, so that the purchasing arrangement of materials is changed from 'evenly distributed according to fixed time' to 'flexibly matched according to the demand'; then, according to the material demand and the material type corresponding to the project construction milestone plan covered by bid opening, issuing bid opening announcement, selecting a supplier matched with each type of material to construct a material supply user portrait, and according to the type and the quantity of the purchased material, sequentially auditing the quality of the material supply user portrait; then, processing and judging the information of the bidder through a purchasing decision terminal; a Prophet model is adopted to obtain a production capacity curve matched with a project construction milestone plan according to historical operation information of each material supply user figure, wherein the Prophet model is suitable for various prediction problems with potential special characteristics, including wide service long-time sequence problems, and has better fitting effects on detection of long-time sequence trend change points, seasonality, holidays and emergencies, the actual supply capacity of a supplier can be well predicted, and the supply stability is further ensured; further, analyzing and judging data from three dimensions (namely fixed material completion degree, dynamic material completion degree and resource proportion), wherein the materials which are prepared before project construction milestone planning start are defined as fixed materials, the materials which are dynamically adjusted according to the start progress are defined as dynamic materials, comprehensive judgment is carried out according to the fixed material completion degree and the dynamic material completion degree, and the stability of the materials provided by the material supply user portrait is sequentially judged; calculating the resource proportion corresponding to each project construction milestone plan according to the bid price of each material supply user figure (the product of the bid price and the material supply quantity obtains the material purchase amount, the resource proportion is obtained according to the ratio of the material purchase amount to the total investment planning amount of the construction milestone plan), carrying out preferential selection according to the supply stability and the cost performance of a supplier to obtain a material purchase decision table, and remarkably improving the adhesion between the material supply quality of the supplier and the project; finally, the bid supplier sequentially acquires the corresponding bid-winning sub-information (the bid-winning sub-information comprises the information of material supply time, material supply type, material supply amount and the like) through the ubiquitous transmission protocol, each bid-winning unit can sequentially check the own bid-winning condition without information leakage, and the safety and reliability of the processes of project bid opening, bid inviting, bid winning and the like are improved.
Preferably, S3, the purchasing decision terminal obtains the bid sub-information corresponding to the bidding terminal through the ubiquitous transmission protocol, including the following steps:
the bidding terminal is provided with a plurality of file cabinets matched with the pictures of the goods and materials supply users and first key information matched with the file cabinets, and the plurality of file cabinets store corresponding bidder information of the pictures of the goods and materials supply users, wherein the bidder information comprises production management information and competitive price information;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; forming a first path set by the plurality of first path information;
a random number generator allocates binary random numbers to the subsets in the first path set, randomly distributes the binary random numbers to file storage subunits corresponding to the purchasing decision terminal and generates corresponding second path information and second key information; forming a second path set by the plurality of second path information;
the purchasing decision terminal obtains first path information and a binary random number corresponding to the file storage subunit, the binary random number is adopted to carry out XOR encryption on the first path to obtain first encrypted information, the first encrypted information is sent to the bidding terminal to be decrypted, the bidding terminal sequentially decrypts the obtained first encrypted information by adopting a first secret key corresponding to the file cabinet to obtain first decrypted information, the first decrypted information is converted into the binary random number and then is subjected to XOR encryption with information corresponding to the file cabinet to obtain second encrypted information, the second encrypted information is sent to the purchasing decision terminal, and the binary random number corresponding to the file storage subunit is adopted to sequentially decrypt the second encrypted information to obtain second decrypted information and carry out target labeling; and if the analyzed second decryption information is the messy code, discarding the second decryption information.
In the scheme, the third-party evidence storage platform is equivalent to a black box and provides configuration paths of the bidding terminal and the purchasing decision terminal, and the first path information and the second path information are randomly matched through a randomly distributed binary random number, so that the respective configuration paths are not directly known by the other party, the successful bid information of the bidding terminal acquired by the purchasing decision terminal is anonymized, and the fairness of the material purchasing decision table are ensured; the principle of the transmission protocol is that a message sender sends a message to a receiver from some messages to be sent, but the message to be sent is still unclear; in this scheme, the bidding terminal sends information to the purchasing decision terminal at random through the blinding transmission protocol, wherein a binary system random number applicable to the blinding transmission protocol is provided by the third-party evidence storage platform, and the purchasing decision terminal sequentially acquires corresponding binary system random numbers according to the second path to perform information encryption and decryption operations, so that privacy and security of information transmission can be greatly ensured, and what needs to be described is that: and the purchasing decision terminal and the bidding terminal are both provided with an encryption and decryption module for implementing the encryption and decryption process related to the ubiquitous transmission protocol.
Preferably, in S5, the acquiring of the fixed material completion degree and the dynamic material completion degree of the material supply user image with respect to the project construction milestone plan includes:
calculating the fixed material supply amount of the material supply user image relative to the project construction milestone plan
Figure 924143DEST_PATH_IMAGE001
The formula is as follows:
Figure 776473DEST_PATH_IMAGE002
；
calculating dynamic material supply amount of material supply user image relative to project construction milestone plan
Figure 90255DEST_PATH_IMAGE003
The formula is as follows:
Figure 703901DEST_PATH_IMAGE004
；
calculating the completion of fixed material
Figure 42391DEST_PATH_IMAGE005
The formula is as follows:
Figure 38641DEST_PATH_IMAGE006
；
calculating dynamic material completeness
Figure 276987DEST_PATH_IMAGE007
The formula is as follows:
Figure 131591DEST_PATH_IMAGE008
；
wherein the content of the first and second substances,
Figure 48338DEST_PATH_IMAGE009
providing a user representation of a productivity curve in a time dimension for a current material supply; t1 is the time point of start of the first project construction milestone program; t01 is the initial supply time point of the material for the user's portrait of the current material supply; t1-t02 represents the transportation time of the supplied material of the user portrait of the current material supplying user;
Figure 167604DEST_PATH_IMAGE010
the fixed material supply requirements for the first project construction milestone program,
Figure 533775DEST_PATH_IMAGE011
the ratio between the fixed material supply demand and the dynamic material supply demand is set artificially according to the project construction period duration or project planning fund ratio for the dynamic material supply demand of the first project construction milestone plan.
Preferably, in S5, the obtaining of the target purchasing user preselection table through fusion calculation based on the fixed material completion degree and the dynamic material completion degree includes:
acquiring a material supply user portrait with a fixed material completion degree greater than or equal to 1 to form a first user subset; obtaining at least two material supply user figures with the fixed material completion degree smaller than 1 and the sum of the fixed material completion degrees larger than or equal to 1 to form a second user subset;
acquiring a material supply user portrait with a dynamic material completion degree greater than or equal to 1 corresponding to the first user subset to construct a third user subset; according to the target resource proportion of the material supply user portrait in the third user subset, performing descending sorting to obtain a first preselected user sequence;
acquiring at least two material supply user portraits corresponding to the first user subset, wherein the dynamic material completion degree is less than 1, and the sum of the dynamic material completion degrees is greater than or equal to 1 to form a fifth user subset, and performing descending sorting according to the resource proportion of a combined target of the material supply user portraits in the fifth user subset to obtain a second preselected user sequence;
removing the material supply user portrait with the sum of the dynamic material completion degrees smaller than 1 in the second user subset to construct a fourth user subset, and performing descending sorting according to the resource proportion of the combined target of the material supply user portrait in the fourth user subset to obtain a third preselected user sequence;
and performing descending editing on the sequence values of the first pre-selection user sequence, the second pre-selection user sequence and the third pre-selection user sequence to obtain a target purchasing user pre-selection sequence corresponding to the project construction milestone plan, and selecting the target purchasing user sequence in the target purchasing user pre-selection sequence according to the resource proportion corresponding to the project construction milestone plan to form a target purchasing user pre-selection list.
In the scheme, the purchasing decision terminal analyzes and judges data from three dimensions (namely fixed material completeness, dynamic material completeness and resource proportion), carries out comprehensive judgment according to the fixed material completeness and the dynamic material completeness, and sequentially judges the stability of the material provided by the portrait of a material supply user; and calculating a resource ratio corresponding to each project construction milestone plan according to the bidding target of each material supply user portrait (the smaller the resource ratio, the higher the material cost performance), and performing preferential selection according to the supply stability and the cost performance of the provider to obtain a material purchasing decision table, so that the adhesion of the material supply quality of the provider and the project is remarkably improved.
Preferably, S6 includes the steps of:
grading the participation degree of each material supply user portrait in the target purchasing user preselection table, wherein the grading formula is as follows:
Figure 306035DEST_PATH_IMAGE012
；
wherein, a1 represents the participation grade matching the current procurement plan for the first material supply user image (the higher the participation grade is, the higher the adhesiveness of the matching item of the material supply user image is, namely, the material supply stability and the cost performance are high);
Figure 294981DEST_PATH_IMAGE013
the material supply weight of the nth sequence position in a target purchasing user preselection table corresponding to the mth project construction milestone plan is 1 if only the first material supply user portrait exists in the previous sequence position; if the current sequence position does not have the first material supply user portrait, the material supply weight is 0; if the current sequence position has other material supply user figures except the first material supply user figure, the material supply weight is the proportion value of the material supply of the current first material supply user figure to the total material supply of the current sequence position; m is the number of project construction milestone plans contained in the current purchasing plan, and N is the number of sequence digits of a target purchasing user pre-selection list corresponding to the project construction milestone plans;
performing priority ranking on the figures of the material supply users according to the participation degree scores; and sequentially selecting the target recommending user with the highest priority in the target purchasing user preselection tables to make a material purchasing decision table.
Preferably, S7 includes the following steps:
the file storage subunit sequentially acquires the bid-winning user portrait information and material supply details of the project construction milestone plan corresponding to the material procurement decision table according to the target marking information, and packs the bid-winning user portrait information and the material supply details into bid-winning sub information;
the bidding terminal sequentially obtains a binary random number and second path information corresponding to the file cabinet, the binary random number is used for carrying out XOR encryption on the second path to obtain third encryption information, the third encryption information is sent to the purchasing decision terminal for decryption, the purchasing decision terminal sequentially decrypts the obtained third encryption information by using a second secret key corresponding to the file storage subunit to obtain third decryption information, the third decryption information is converted into a binary random number, then the third decryption information and the winning-bid information corresponding to the file storage subunit are subjected to XOR encryption to obtain fourth encryption information, the fourth encryption information is sent to the bidding terminal, and the fourth encryption information is sequentially subjected to XOR decryption by using the binary random number corresponding to the file cabinet to obtain fourth decryption information; and if the fourth decryption information obtained by analysis is the messy code, discarding the fourth decryption information.
In the scheme, the third-party evidence storage platform is equivalent to a black box and provides the configuration paths of the bidding terminal and the purchasing decision terminal, but the paths are not known by both parties, so that the first path information and the second path information are randomly matched through the randomly distributed binary random numbers, the winning bid information sent by the purchasing decision terminal acquired by the bidding terminal can only be identified by the third party information, and the privacy is ensured.
Preferably, S1 includes the following steps:
according to the material details of each material in the material equipment inventory of the major network power engineering project, combining with a project construction milestone plan to obtain the material-to-goods deadline, and comparing with a first-level department material purchasing catalogue list to determine the purchasing mode of the material, wherein the purchasing mode comprises a first-level department batch and a second-level department batch;
determining the demand information of various materials according to the project construction milestone plan; comparing the historical purchasing time and the arrival deadline time of the material to determine the optimal purchasing time period of the material;
determining the prepayment cost of project demand materials according to a purchasing mode, and if the prepayment cost of the project demand materials is less than the project investment planning cost of the project construction milestone plan within the optimal purchasing time period, bringing the materials into a first-level department material bidding batch plan table; and obtaining the bid opening time in the project bidding batch schedule of the primary department according to the project construction milestone plan and the optimal purchasing time period of the corresponding materials, and further obtaining a project bidding plan task book with material supply matched with the project construction milestone plan.
In the scheme, in the early stage of the bid opening of a project, a project bid inviting plan task book needs to be made, so that a material demand plan, a project investment plan and a project construction milestone plan are adaptive, and the number of the project construction milestone plans, material demand plans (types and quantities of materials) and bid opening time covered by each bid opening is made according to the demands of the project construction milestone plan on materials and the project investment plan, so that the purchasing arrangement of the materials is changed from 'average distribution according to fixed time' to 'flexible matching according to the demands'.
A purchasing decision system is suitable for a purchasing decision method for dynamically sensing material demand change, and comprises a purchasing decision terminal, a bidding terminal and a third-party evidence storage platform;
the purchasing decision terminal is used for generating a material purchasing plan according to the project bid plan task book and generating a material purchasing decision table according to the material purchasing plan; the bidding terminal is in interactive connection with the third-party certificate storage platform;
the bidding terminal sends the tender information of the portrait of the material supply user to the purchasing decision terminal for operation;
and the third-party evidence storing platform is used for generating first path information mapped with the bidding terminal and second path information mapped with the purchasing decision terminal so as to realize the information interaction between the bidding terminal and the purchasing decision terminal.
Preferably, the bidding terminal is provided with a plurality of file cabinets matched with the pictures of the material supply users and first key information matched with the file cabinets, the plurality of file cabinets store corresponding bidder information of the pictures of the material supply users, and the bidder information comprises production management information and competitive price information;
the purchasing decision terminal is provided with a file storage subunit and corresponding second key information, the file storage subunit is matched with the number of the file cabinets, and the file storage subunit stores winning bid subunit information obtained according to the material purchasing decision table;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; and the file storage subunit corresponding to the purchasing decision terminal and the third-party evidence storage platform establish mapping to generate corresponding second path information.
Preferably, the third-party authentication platform comprises a random number generator, the random number generator generates a binary random number matching the number of the file cabinets, and the binary random number is used as an exclusive or operation information flow when the procurement decision system executes the ubiquitous transmission protocol.
The purchasing decision method and the system for dynamically sensing the material demand change have the following beneficial effects:
(1) in the early stage of project bid opening, a project bid inviting plan task book is formulated, so that material demand plans, project investment plans and project construction milestone plans are adapted, the number of the project construction milestone plans, the material demand plans (types and quantity of materials) and the bid opening time covered by each bid opening are formulated according to the requirements of each project construction milestone plan on the materials and the project investment plans, the material purchasing arrangement is changed from 'average distribution according to fixed time' to 'flexible matching according to requirements', and the problem that the development of the project material purchasing and bid plans is not tightly connected with the material demand plans, the project investment plans and the project construction milestone plans is solved;
(2) the purchasing decision terminal performs information interaction with the bidding terminal through a ubiquitous transmission protocol, the third-party evidence storing platform provides configuration paths of the bidding terminal and the purchasing decision terminal, and the first path information and the second path information are randomly matched through a randomly distributed binary random number, so that the respective configuration paths are not directly known by the other party, the bid-winning sub information of the bidding terminal acquired by the purchasing decision terminal is anonymized, the malicious bidding phenomenon is prevented, and the safety and reliability of the processes of project bid opening, bid inviting, bid winning and the like are further ensured.
(3) The purchasing decision terminal analyzes and judges data from three dimensions (namely fixed material completion, dynamic material completion and resource proportion), carries out comprehensive judgment according to the fixed material completion and the dynamic material completion, and sequentially judges the stability of the material provided by the portrait of the material supply user; and calculating a resource ratio corresponding to each project construction milestone plan according to the bidding target of each material supply user portrait (the smaller the resource ratio, the higher the material cost performance), and performing preferential selection according to the supply stability and the cost performance of the provider to obtain a material purchasing decision table, so that the adhesion of the material supply quality of the provider and the project is remarkably improved.
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Fig. 1 is a flowchart of a purchasing decision method for dynamically sensing a material demand change according to the present invention.
Fig. 2 is a schematic structural diagram of a scenario for a ubiquitous transmission protocol according to the present invention.
Fig. 3 is a schematic structural diagram of a purchasing decision system according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, it is to be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and does not limit the scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts belong to the scope of the present invention.
Example (b): as shown in fig. 1, a purchasing decision method for dynamically sensing the change of material demand includes the following steps:
and S1, obtaining a project bid plan task book according to the material demand plan, the project investment plan and the project construction milestone plan.
Specifically, S1 includes the following steps:
according to the material details of each material in the material equipment inventory of the major network power engineering project, combining with a project construction milestone plan to obtain the material-to-goods deadline, and comparing with a first-level department material purchasing catalogue list to determine the purchasing mode of the material, wherein the purchasing mode comprises a first-level department batch and a second-level department batch; for example: the first-level department is a purchasing department of a national network head company, and the second-level department is a purchasing department of a provincial company;
determining the demand information of various materials according to the project construction milestone plan; comparing the historical purchasing time and the arrival deadline time of the material to determine the optimal purchasing time period of the material;
determining the prepayment cost of project demand materials according to a purchasing mode, and if the prepayment cost of the project demand materials is less than the project investment planning cost of the project construction milestone plan within the optimal purchasing time period, bringing the materials into a first-level department material bidding batch plan table; and obtaining the bid opening time in the project bidding batch schedule of the primary department according to the project construction milestone plan and the optimal purchasing time period of the corresponding materials, and further obtaining a project bidding plan task book with material supply matched with the project construction milestone plan.
In this embodiment, in the early stage of the bid opening of the project, a project bid inviting plan task book needs to be formulated, so that the material demand plan, the project investment plan and the project construction milestone plan are adapted, and the number of the project construction milestone plans, the material demand plan (the types and the number of the materials, and the types of the materials can be steel materials, cables, insulators and the like for erecting an electric tower) and the bid opening time covered by each bid opening are formulated according to the requirements of the project construction milestone plan for the materials and the project investment plan, so that the purchasing arrangement of the materials is changed from "even distribution according to fixed time" to "flexible matching according to the requirements".
S2, acquiring project construction milestone plans of project bid plan task books and corresponding material demand information, and constructing material supply user images according to material attributes; the material demand information comprises fixed material demand information and dynamic material demand information.
In this embodiment, the materials to be prepared before the project construction milestone is planned to be operated are fixed materials, the materials dynamically adjusted according to the project operation progress are dynamic materials, and the ratio between the fixed material supply demand and the dynamic material supply demand is artificially set according to the project construction period duration or the project planning fund ratio, for example, the ratio may be 10: 1.
And S3, the purchasing decision terminal acquires the bidder information corresponding to the bidding terminal through the ubiquitous transmission protocol.
Specifically, S3 includes the following steps:
the bidding terminal is provided with a plurality of file cabinets matched with the pictures of the material supply users and first key information matched with the file cabinets, and the plurality of file cabinets store corresponding bidder information of the pictures of the material supply users, wherein the bidder information comprises production management information and competitive price information;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; forming a first path set by the plurality of first path information;
a random number generator allocates binary random numbers to the subsets in the first path set, randomly distributes the binary random numbers to file storage subunits corresponding to the purchasing decision terminal and generates corresponding second path information and second key information; forming a second path set by the plurality of second path information;
the purchasing decision terminal obtains first path information and a binary random number corresponding to the file storage subunit, the binary random number is adopted to carry out XOR encryption on the first path to obtain first encrypted information, the first encrypted information is sent to the bidding terminal to be decrypted, the bidding terminal sequentially decrypts the obtained first encrypted information by adopting a first secret key corresponding to the file cabinet to obtain first decrypted information, the first decrypted information is converted into the binary random number and then is subjected to XOR encryption with information corresponding to the file cabinet to obtain second encrypted information, the second encrypted information is sent to the purchasing decision terminal, and the binary random number corresponding to the file storage subunit is adopted to sequentially decrypt the second encrypted information to obtain second decrypted information and carry out target labeling; and if the analyzed second decryption information is the messy code, discarding the second decryption information.
In the embodiment, the third-party evidence storage platform is equivalent to a black box and provides configuration paths of the bidding terminal and the purchasing decision terminal, and the first path information and the second path information are randomly matched through a randomly distributed binary random number, so that the respective configuration paths are not directly known by the other party, the successful bid information of the bidding terminal acquired by the purchasing decision terminal is anonymized, and the fairness of the material purchasing decision table are ensured; the principle of the ubiquitous transmission protocol is that a message sender sends one message to a receiver from some messages to be sent, but the recipient still prefers which message is sent afterwards; in the scheme, the bidding terminal sends information to the purchasing decision terminal randomly through the ubiquitous transmission protocol, wherein the binary random number suitable for the ubiquitous transmission protocol is provided by the third-party evidence storage platform, and the purchasing decision terminal sequentially acquires the corresponding binary random numbers according to the second path to perform information encryption and decryption operations, so that the privacy and the safety of information transmission can be greatly ensured, and the scheme is as follows: and the purchasing decision terminal and the bidding terminal are both provided with an encryption and decryption module for implementing the encryption and decryption process related to the ubiquitous transmission protocol.
As shown in fig. 2, a schematic structural diagram of a scenario applicable to the casual transmission protocol is assumed that the number of material supply users corresponding to the bidding terminal is 6, the corresponding address codes of the file cabinets are (a 1, a2, A3, A4, A5, A6), the binary numbers generated by the third party certification platform are (L1, L2, L3, L4, L5, L6), the address codes of the file storage sub-units corresponding to the purchasing decision terminals are (B1, B2, B3, B4, B5, B6), the first path set is { (a 1-L1), (a 2-L2), (A3-L3), (A4-L4), (A5-L5), (A6-L6) }, and the binary random number is randomly allocated to the file storage sub-units, so that the second path information storage sub-unit matches the second path information with the second random number (e.g., the second path information storage sub-B1) may be, e.g., a random number set (B3, A3) (B2-L4), (B3-L2), (B4-L1), (B5-L6) and (B6-L5), so that the respective configuration paths are not directly known by the other party, the winning bid sub information of the bidding terminal acquired by the purchasing decision terminal is anonymized, and the fairness and fairness of the material purchasing decision table are ensured.
S4, predicting the productivity of the material supply user portrait in the time dimension by adopting a prophet model to obtain a productivity curve, and acquiring the material transportation time according to the material supply and logistics information of each material supply user portrait.
In the embodiment, a Prophet model is adopted to obtain the production capacity curve matched with the project construction milestone plan according to the historical operation information of each material supply user figure, wherein the Prophet model is suitable for various prediction problems with potential special characteristics, including extensive service long-time sequence problems, and has better fitting effect on detection of long-time sequence trend change points, seasonality, holidays and emergencies, the actual supply capacity of a supplier can be well predicted, and the supply stability is further ensured.
S5, acquiring the fixed material completion degree and the dynamic material completion degree of the material supply user portrait relative to each project construction milestone plan; and performing fusion calculation based on the fixed material completion degree and the dynamic material completion degree to obtain a target purchasing user pre-selection table.
The method for acquiring the fixed material completion degree and the dynamic material completion degree of the material supply user portrait relative to each project construction milestone plan comprises the following steps:
calculating the fixed material supply amount of the material supply user image relative to the project construction milestone plan
Figure 460694DEST_PATH_IMAGE001
The formula is as follows:
Figure 772333DEST_PATH_IMAGE002
；
calculating dynamic material supply amount of material supply user image relative to project construction milestone plan
Figure 97135DEST_PATH_IMAGE014
The formula is as follows:
Figure 581118DEST_PATH_IMAGE004
；
calculating the completion of fixed material
Figure 547413DEST_PATH_IMAGE005
The formula is as follows:
Figure 786545DEST_PATH_IMAGE006
；
calculating dynamic material completeness
Figure 536326DEST_PATH_IMAGE015
The formula is as follows:
Figure 146037DEST_PATH_IMAGE016
；
wherein the content of the first and second substances,
Figure 864375DEST_PATH_IMAGE009
providing a user representation of a productivity curve in a time dimension for a current material supply; t1 is the time point of start of the first project construction milestone program; t01 is the initial supply time point of the material for the user's portrait of the current material supply; t1-t02 is the supply material transportation time of the current material supply user portrait;
Figure 517817DEST_PATH_IMAGE010
the fixed material supply requirements for the first project construction milestone program,
Figure 754895DEST_PATH_IMAGE011
for the dynamic material supply requirement of the first project construction milestone plan, the ratio between the fixed material supply requirement and the dynamic material supply requirement is manually set according to the project construction period duration or project planning fund ratio; it can be known that the fixed material completion degree and the dynamic material completion degree corresponding to the project construction milestone plans are calculated in the same manner.
In this embodiment, let the planned number of project construction milestones corresponding to the present bid be 1, count T1; for the first kind of material, the number of the material supply user images participating in the bidding is 6, A1, A2, A3, A4, A5 and A6 are counted, and the fixed material completion degree and the dynamic material completion degree of the 6 material supply user images relative to each project construction milestone plan calculated according to the formula are shown in Table 1.
TABLE 1 comparison table of fixed material completeness and dynamic material completeness of project construction milestone plan
Figure 157844DEST_PATH_IMAGE017
In S5, performing fusion calculation based on the fixed material completion and the dynamic material completion to obtain a target purchasing user preselection table, including:
acquiring a material supply user portrait with a fixed material completion degree greater than or equal to 1 to form a first user subset; obtaining at least two material supply user figures with the fixed material completion degree smaller than 1 and the sum of the fixed material completion degrees larger than or equal to 1 to form a second user subset; as shown in table 1, the first subset of users is { a1, a2, A3}, and the second subset of users is { (a 4, a 5), (a 5, a 6), (a 4, a5, a 6) };
acquiring a material supply user portrait with a dynamic material completion degree greater than or equal to 1 corresponding to the first user subset to construct a third user subset; according to the target resource proportion of the material supply user portrait in the third user subset, performing descending sorting to obtain a first preselected user sequence; as can be seen from Table 1, the third subset of users is { A1 }, the first preselected sequence of users is [ A1 ];
acquiring at least two material supply user portraits corresponding to the first user subset, wherein the dynamic material completion degree is less than 1, and the sum of the dynamic material completion degrees is greater than or equal to 1 to form a fifth user subset, and performing descending sorting according to the resource proportion of a combined target of the material supply user portraits in the fifth user subset to obtain a second preselected user sequence; as can be seen from table 1, the fifth subset of users is { (a 1, a 2) }, and the second preselected sequence of users is [ (a 1, a 2) ];
removing the material supply user portrait with the sum of the dynamic material completion degrees smaller than 1 in the second user subset to construct a fourth user subset, and performing descending sorting according to the resource proportion of the combined target of the material supply user portrait in the fourth user subset to obtain a third preselected user sequence; as can be seen from table 1, the fourth subset of users is { (a 5, A6), (a 4, a5, A6) }, and assuming that the resource proportion of the combined target of the material supply user images (a 4, a5, A6) is smaller than the resource proportion of the combined target of the material supply user images (a 5, A6), the third preselected user sequence is [ (a 4, a5, A6), (a 5, A6) ];
and performing descending editing on the sequence values of the first pre-selection user sequence, the second pre-selection user sequence and the third pre-selection user sequence to obtain a target purchasing user pre-selection sequence corresponding to the project construction milestone plan, and selecting the target purchasing user sequence in the target purchasing user pre-selection sequence according to the resource proportion corresponding to the project construction milestone plan to form a target purchasing user pre-selection list. Assume that the target purchasing user pre-selected sequence is [ (a 4, a5, a 6), (a 1, a 2), (a 5, a 6), a1 ]. Wherein, the sequence of the sequence shows that the cost performance of material supply is arranged from large to small; if the cost performance of the material supply user image A1 is less than that of the material supply user images (A5 and A6), the material supply user image with the resource occupation ratio in the target purchasing user preselection sequence larger than the corresponding investment amount of the project construction milestone plan (the investment amount of the project construction milestone plan is calculated according to the occupation ratio of the total investment plan of the project station project), for example, the material supply user image A1 has the lowest cost performance, the corresponding material purchasing amount is higher and larger than the corresponding investment amount of the project construction milestone plan, then the material supply user image is selected to be removed, and the target purchasing user preselection table [ (A4, A5, A6), (A1, A2), (A5, A6) ].
In the embodiment, the purchasing decision terminal analyzes and judges data from three dimensions (namely, the fixed material completion degree, the dynamic material completion degree and the resource proportion), carries out comprehensive judgment according to the fixed material completion degree and the dynamic material completion degree, and sequentially judges the stability of providing materials by the material supply user portrait; according to bidding targets of each project construction milestone plan, calculating a resource proportion corresponding to each project construction milestone plan (the smaller the resource proportion is, the higher the cost performance of the materials is), and performing preferential selection according to the supply stability and the cost performance of the provider to obtain a material purchasing decision table, so that the adhesion degree of the material supply quality of the provider and the projects is remarkably improved.
And S6, scoring the participation degree of each material supply user image in the target purchasing user pre-selection table, and selecting the target recommending users in the target purchasing user pre-selection table corresponding to each project construction milestone plan in sequence to make a material purchasing decision table.
S6 includes the steps of:
grading the participation degree of each material supply user portrait in the target purchasing user preselection table, wherein the grading formula is as follows:
Figure 255988DEST_PATH_IMAGE018
wherein, a1 is the participation score of the first material supply user figure matching the current procurement plan (the higher the participation score is, the higher the adhesiveness of the matching item of the material supply user figure is, namely, the material supply stability and the cost performance ratio are high);
Figure 270211DEST_PATH_IMAGE019
the material supply weight of the nth sequence position in a target purchasing user preselection table corresponding to the mth project construction milestone plan is 1 if only the first material supply user portrait exists in the previous sequence position; if the current sequence position does not have the first material supply user portrait, the material supply weight is 0; if the current sequence position has other material supply user figures except the first material supply user figure, the material supply weight is the proportion value of the material supply of the current first material supply user figure to the total material supply of the current sequence position; m is the current procurement plan inner bagThe number of project construction milestone plans is contained, and N is the number of sequence digits of a target purchasing user pre-selection list corresponding to the project construction milestone plans;
performing priority ranking on the figures of the material supply users according to the participation degree scores; and sequentially selecting the target recommending user with the highest priority in the target purchasing user preselection tables to make a material purchasing decision table.
In this embodiment, when the target purchasing user preselection table is [ (a 4, a5, a 6), (a 1, a 2), (a 5, a 6) ], if the material supply user portrait (a 4, a5, a 6) corresponds to the material supply ratio of (0.6, 0.2); the material supply ratio corresponding to the material supply user figures (A1, A2) is (0.8, 0.2); the material supply ratio corresponding to the material supply user figures (A5, A6) is (0.5 ); it can be known that the participation score a1=0.8 corresponding to the material supply user representation a1, the participation score a2=0.2 corresponding to the material supply user representation a2, the participation score A3=0 corresponding to the material supply user representation A3, the participation score a4=0.6 corresponding to the material supply user representation a4, the participation score a5=0.7 corresponding to the material supply user representation a5, the participation score a7=0.7 corresponding to the material supply user representation A6, the priority ranking of the material supply user representation is [ a1, a5, A6, a4, a2, A3], in this embodiment, the target recommendation user is (a 1, a 2); if the number of the project construction milestone plans is multiple, the corresponding priority ranking of the material supply user representation may change according to the calculation of the method, and the corresponding target recommendation user may also change, which is not described again.
And S7, sending the bid winning sub-information of the project construction milestone plan corresponding to the material purchasing decision table to the bidding terminal through the loss transmission protocol.
S7, comprising the following steps:
the file storage subunit sequentially acquires the bid-winning user portrait information and material supply details of the project construction milestone plan corresponding to the material procurement decision table according to the target marking information, and packs the bid-winning user portrait information and the material supply details into bid-winning sub information; the material supply details comprise information such as material supply time, material supply type, material supply quantity and the like;
the bidding terminal sequentially obtains a binary random number and second path information corresponding to the file cabinet, the binary random number is used for carrying out XOR encryption on the second path to obtain third encryption information, the third encryption information is sent to the purchasing decision terminal for decryption, the purchasing decision terminal sequentially decrypts the obtained third encryption information by using a second secret key corresponding to the file storage subunit to obtain third decryption information, the third decryption information is converted into a binary random number, then the third decryption information and the winning-bid information corresponding to the file storage subunit are subjected to XOR encryption to obtain fourth encryption information, the fourth encryption information is sent to the bidding terminal, and the fourth encryption information is sequentially subjected to XOR decryption by using the binary random number corresponding to the file cabinet to obtain fourth decryption information; if the fourth decryption information obtained by analysis is a messy code, discarding the fourth decryption information; it can be known that the fourth decryption information is the winning bid information.
In this embodiment, the third party evidence storing platform is equivalent to a black box, and provides the configuration paths of the bidding terminal and the purchasing decision terminal, but the paths are not known by both parties, so that the first path information and the second path information are arbitrarily matched through the randomly distributed binary random numbers, and the winning bid sub information sent by the purchasing decision terminal acquired by the bidding terminal can only be identified by the third party information, thereby ensuring privacy.
As shown in fig. 3, a purchasing decision system is suitable for a purchasing decision method for dynamically sensing material demand changes, and includes a purchasing decision terminal, a bidding terminal, and a third-party evidence storage platform;
the purchasing decision terminal is used for generating a material purchasing plan according to the project bid plan task book and generating a material purchasing decision table according to the material purchasing plan; the bidding terminal is in interactive connection with the third-party certificate storage platform;
the bidding terminal sends the tender information of the portrait of the material supply user to the purchasing decision terminal for operation;
and the third-party evidence storing platform is used for generating first path information mapped with the bidding terminal and second path information mapped with the purchasing decision terminal so as to realize the information interaction between the bidding terminal and the purchasing decision terminal.
The bidding terminal is provided with a plurality of file cabinets matched with the pictures of the material supply users and first key information matched with the file cabinets, and the plurality of file cabinets store corresponding bidder information of the pictures of the material supply users, wherein the bidder information comprises production management information and competitive price information;
the purchasing decision terminal is provided with a file storage subunit and corresponding second key information, the file storage subunit is matched with the number of the file cabinets, and the file storage subunit stores winning bid subunit information obtained according to the material purchasing decision table;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; and the file storage subunit corresponding to the purchasing decision terminal and the third-party evidence storage platform establish mapping to generate corresponding second path information.
The third-party evidence storing platform comprises a random number generator, wherein the random number generator generates a binary random number matched with the number of the file cabinets, and the binary random number is used as an exclusive or operation information flow when the purchasing decision system executes the ubiquitous transmission protocol.
The above-mentioned embodiments are preferred embodiments of the purchasing decision method and system for dynamically sensing the change of material demand according to the present invention, and the scope of the present invention is not limited thereto, and all equivalent changes made according to the shape and structure of the present invention are within the protection scope of the present invention.

Claims (10)

1. A purchasing decision method for dynamically sensing material demand change is characterized by comprising the following steps: the method comprises the following steps:
s1, obtaining a project bid plan task book according to the material demand plan, the project investment plan and the project construction milestone plan;
s2, acquiring project construction milestone plans of project bid plan task books and corresponding material demand information, and constructing material supply user images according to material attributes; the material demand information comprises fixed material demand information and dynamic material demand information;
s3, the purchasing decision terminal acquires the bidder information corresponding to the bidding terminal through the ubiquitous transmission protocol;
s4, predicting the productivity of the material supply user portrait in the time dimension by adopting a prophet model to obtain a productivity curve, and acquiring material transportation time according to material supply and logistics information of each material supply user portrait;
s5, acquiring the fixed material completion degree and the dynamic material completion degree of the material supply user portrait relative to each project construction milestone plan; performing fusion calculation based on the fixed material completion degree and the dynamic material completion degree to obtain a target purchasing user pre-selection table;
s6, scoring the participation degree of each material supply user portrait in the target purchasing user preselection table, and selecting target recommending users in the target purchasing user preselection table corresponding to each project construction milestone plan in sequence to make a material purchasing decision table;
and S7, sending the bid winning sub-information of the project construction milestone plan corresponding to the material purchasing decision table to the bidding terminal through the loss transmission protocol.
2. The procurement decision method of claim 1 for dynamically sensing material demand changes, characterized by:
s3, the purchasing decision terminal obtains the corresponding tender information of the tender terminal through the ubiquitous transmission protocol, including the following steps:
the bidding terminal is provided with a plurality of file cabinets matched with the pictures of the material supply users and first key information matched with the file cabinets, and the plurality of file cabinets store corresponding bidder information of the pictures of the material supply users, wherein the bidder information comprises production management information and competitive price information;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; forming a first path set by the plurality of first path information;
a random number generator allocates binary random numbers to the subsets in the first path set, randomly distributes the binary random numbers to file storage subunits corresponding to the purchasing decision terminal and generates corresponding second path information and second key information; forming a second path set by the plurality of second path information;
the purchasing decision terminal obtains first path information and a binary random number corresponding to the file storage subunit, the binary random number is adopted to carry out XOR encryption on the first path to obtain first encrypted information, the first encrypted information is sent to the bidding terminal to be decrypted, the bidding terminal sequentially decrypts the obtained first encrypted information by adopting a first secret key corresponding to the file cabinet to obtain first decrypted information, the first decrypted information is converted into the binary random number and then is subjected to XOR encryption with information corresponding to the file cabinet to obtain second encrypted information, the second encrypted information is sent to the purchasing decision terminal, and the binary random number corresponding to the file storage subunit is adopted to sequentially decrypt the second encrypted information to obtain second decrypted information and carry out target labeling; and if the analyzed second decryption information is the messy code, discarding the second decryption information.
3. The procurement decision method of claim 1 for dynamically sensing material demand changes, characterized by:
in S5, the method for obtaining the fixed material completion degree and the dynamic material completion degree of the material supply user portrait relative to the project construction milestone plan includes:
calculating the fixed material supply quantity of the material supply user image relative to the project construction milestone plan
Figure 538274DEST_PATH_IMAGE001
The formula is as follows:
Figure 930859DEST_PATH_IMAGE002
；
calculating dynamic material supply amount of material supply user image relative to project construction milestone plan
Figure 387992DEST_PATH_IMAGE003
The formula is as follows:
Figure 761467DEST_PATH_IMAGE004
；
calculating the completion of fixed material
Figure 335317DEST_PATH_IMAGE005
The formula is as follows:
Figure 45391DEST_PATH_IMAGE006
；
calculating dynamic material completeness
Figure 676355DEST_PATH_IMAGE007
The formula is as follows:
Figure 540055DEST_PATH_IMAGE008
；
wherein the content of the first and second substances,
Figure 239633DEST_PATH_IMAGE009
providing a user representation of a productivity curve in a time dimension for a current material supply; t1 is the time point of start of the first project construction milestone program; t01 is the initial supply time point of the material for the user's portrait of the current material supply; t1-t02 is the supply material transportation time of the current material supply user portrait;
Figure 603881DEST_PATH_IMAGE010
the fixed material supply requirements for the first project construction milestone program,
Figure 32714DEST_PATH_IMAGE011
the ratio between the fixed material supply demand and the dynamic material supply demand is set artificially according to the project construction period duration or project planning fund ratio for the dynamic material supply demand of the first project construction milestone plan.
4. The procurement decision method of claim 1 or 3 for dynamically sensing material demand change, characterized by:
in S5, performing fusion calculation based on the fixed material completion and the dynamic material completion to obtain a target purchasing user preselection table, including:
acquiring a material supply user portrait with a fixed material completion degree greater than or equal to 1 to form a first user subset; obtaining at least two material supply user figures with the fixed material completion degree smaller than 1 and the sum of the fixed material completion degrees larger than or equal to 1 to form a second user subset;
acquiring a material supply user portrait with a dynamic material completion degree greater than or equal to 1 corresponding to the first user subset to construct a third user subset; according to the target resource proportion of the material supply user portrait in the third user subset, performing descending sorting to obtain a first preselected user sequence;
acquiring at least two material supply user portraits corresponding to the first user subset, wherein the dynamic material completion degree is less than 1, and the sum of the dynamic material completion degrees is greater than or equal to 1 to form a fifth user subset, and performing descending sorting according to the resource proportion of a combined target of the material supply user portraits in the fifth user subset to obtain a second preselected user sequence;
removing the material supply user portrait with the sum of the dynamic material completion degrees smaller than 1 in the second user subset to construct a fourth user subset, and performing descending sorting according to the resource proportion of the combined target of the material supply user portrait in the fourth user subset to obtain a third preselected user sequence;
and performing descending editing on the sequence values of the first pre-selection user sequence, the second pre-selection user sequence and the third pre-selection user sequence to obtain a target purchasing user pre-selection sequence corresponding to the project construction milestone plan, and selecting the target purchasing user sequence in the target purchasing user pre-selection sequence according to the resource proportion corresponding to the project construction milestone plan to form a target purchasing user pre-selection list.
5. The procurement decision-making method for dynamically sensing material demand changes according to claim 4, characterized by: s6 includes the steps of:
grading the participation degree of each material supply user portrait in the target purchasing user preselection table, wherein the grading formula is as follows:
Figure 852552DEST_PATH_IMAGE012
；
wherein a1 represents a first material supply user profile matching the participation score of the current procurement plan;
Figure 762346DEST_PATH_IMAGE013
the material supply weight of the nth sequence position in a target purchasing user preselection table corresponding to the mth project construction milestone plan is 1 if only the first material supply user portrait exists in the previous sequence position; if the current sequence position does not have the first material supply user portrait, the material supply weight is 0; if the current sequence position has other material supply user figures except the first material supply user figure, the material supply weight is the proportion value of the material supply of the current first material supply user figure to the total material supply of the current sequence position; m is the number of project construction milestone plans contained in the current purchasing plan, and N is the number of sequence digits of a target purchasing user pre-selection list corresponding to the project construction milestone plans;
performing priority ranking on the figures of the material supply users according to the participation degree scores; and sequentially selecting the target recommending user with the highest priority in the target purchasing user preselection tables to make a material purchasing decision table.
6. The procurement decision method of claim 2 for dynamically sensing material demand changes, characterized by:
s7, comprising the following steps:
the file storage subunit sequentially acquires the bid-winning user portrait information and material supply details of the project construction milestone plan corresponding to the material procurement decision table according to the target marking information, and packs the bid-winning user portrait information and the material supply details into bid-winning sub information;
the bidding terminal sequentially obtains a binary random number and second path information corresponding to the file cabinet, the binary random number is used for carrying out XOR encryption on the second path to obtain third encryption information, the third encryption information is sent to the purchasing decision terminal for decryption, the purchasing decision terminal sequentially decrypts the obtained third encryption information by using a second secret key corresponding to the file storage subunit to obtain third decryption information, the third decryption information is converted into a binary random number, then the third decryption information and the winning-bid information corresponding to the file storage subunit are subjected to XOR encryption to obtain fourth encryption information, the fourth encryption information is sent to the bidding terminal, and the fourth encryption information is sequentially subjected to XOR decryption by using the binary random number corresponding to the file cabinet to obtain fourth decryption information; and if the fourth decryption information obtained by analysis is the messy code, discarding the fourth decryption information.
7. The procurement decision method of claim 1 for dynamically sensing material demand changes, characterized by:
s1, comprising the following steps:
according to the material details of each material in the material equipment inventory of the major network power engineering project, combining with a project construction milestone plan to obtain the material-to-goods deadline, and comparing with a first-level department material purchasing catalogue list to determine the purchasing mode of the material, wherein the purchasing mode comprises a first-level department batch and a second-level department batch;
determining the demand information of various materials according to the project construction milestone plan; comparing the historical purchasing time and the arrival deadline time of the material to determine the optimal purchasing time period of the material;
determining the prepayment cost of project demand materials according to a purchasing mode, and if the prepayment cost of the project demand materials is less than the project investment planning cost of the project construction milestone plan within the optimal purchasing time period, bringing the materials into a first-level department material bidding batch plan table; and obtaining the bid opening time in the project bidding batch schedule of the primary department according to the project construction milestone plan and the optimal purchasing time period of the corresponding materials, and further obtaining a project bidding plan task book with material supply matched with the project construction milestone plan.
8. A purchasing decision system, which is suitable for the purchasing decision method capable of dynamically sensing the change of material demand according to any one of claims 1 to 7, and is characterized in that:
the system comprises a purchasing decision terminal, a bidding terminal and a third party evidence storage platform;
the purchasing decision terminal is used for generating a material purchasing plan according to the project bid plan task book and generating a material purchasing decision table according to the material purchasing plan; the bidding terminal is in interactive connection with the third-party certificate storage platform;
the bidding terminal sends the tender information of the portrait of the material supply user to the purchasing decision terminal for operation;
and the third-party evidence storing platform is used for generating first path information mapped with the bidding terminal and second path information mapped with the purchasing decision terminal so as to realize the information interaction between the bidding terminal and the purchasing decision terminal.
9. The procurement decision system of claim 8 characterized by:
the bidding terminal is provided with a plurality of file cabinets matched with the pictures of the material supply users and first key information matched with the file cabinets, and the plurality of file cabinets store corresponding bidder information of the pictures of the material supply users, wherein the bidder information comprises production management information and competitive price information;
the purchasing decision terminal is provided with a file storage subunit and corresponding second key information, the number of the file storage subunit is matched with that of the file cabinets, and the file storage subunit stores winning bid information obtained according to the material purchasing decision table;
the third party certificate storage platform and the file cabinet are mapped to generate corresponding first path information; and the file storage subunit corresponding to the purchasing decision terminal and the third-party evidence storage platform establish mapping to generate corresponding second path information.
10. The procurement decision system of claim 9 characterized by:
the third-party evidence storing platform comprises a random number generator, wherein the random number generator generates a binary random number matched with the number of the file cabinets, and the binary random number is used as an exclusive-or operation information flow when the purchasing decision system executes the ubiquitous transmission protocol.
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