CN104732361A - Method for building IDEF models of wheat processing enterprise - Google Patents
Method for building IDEF models of wheat processing enterprise Download PDFInfo
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Abstract
The invention provides a method for building IDEF models of a wheat processing enterprise. The IDEF models include the IDEF0 function model and the IDEF1X data model. The method comprises the following steps: 1, describing the flow according to processing production process characteristics of the wheat processing enterprise; 2, abstracting function subsystems of the wheat processing enterprise through demand analysis, determining input, output, control and mechanisms of a box of the IDEF0 model according to the procedure characteristics of the enterprise, building the subsystems from top to bottom on the basis of a top layer picture to form the IDEF0 function model of the wheat processing enterprise, and expanding an information database, a document library and an IDEF0 map depot; 3, utilizing the information for conducting auxiliary software design including the database design, the software module design and the data interface design; 4, determining the modeling boundary and range of the data model of the wheat processing enterprise, determining modeling entity, contact, bond and corresponding attributes of the characteristics of the enterprise, and conducting repeated iteration to determine the IDEF1X data model. The built IDEF model covers the procedure characteristics of the wheat processing production process and has certain universality for the wheat processing enterprise.
Description
Technical field
The present invention relates to computer application field, be specifically related to one and set up wheat processing enterprise IDEF((ICAM Definition Languages)) method of model.
Background technology
The wheat processing industry of China is throughout town and country, and scattered distribution, according to relevant investigation and calculate, big and small wheat flour processing enterprise of China reaches more than 20,000, and has certain production-scale enterprise ratio relatively little.For many years, wheat processing industry is through continuous recombination and integration, and enterprise's monomer scale constantly expands, but entirety is still in the majority with small-scale enterprise.This present situation has highlighted the series of problems of wheat processing industry, and such as because of interests mechanism imperfection, production became divorced from marketing, lacks the over capacity planned and cause; Process technology falls behind, and the market supply and demand is not docked, and is difficult to meet the need of market; Product structure is single, and product quality quality is unstable; Production efficiency is low, and product profit rate is general not high.
And in recent years, under the macro adjustments and controls of government and the competition of the market survival of the fittest, wheat processing industry also progressively creates new development and change.Some small scales, production capacity is low, and wheat processing enterprise backward in technique is progressively by market, and large-scale production and intensive management become new trend.Constantly employ new technology, improve resource utilization.Meanwhile, the attention of food-safety problem also makes the supervision of product quality and handle control more and more stricter.
Wheat processing enterprise production lot is large, with short production cycle, and production run is carried out continuously, and technological process immobilizes, and has higher requirement to the real-time of production and processing, accuracy.For the feature of wheat processing industry, and the trend of its enterprise scale, improving wheat processing information level of the enterprise is the important content improving its competitive power.
Enterprise needs to accomplish monitoring and timely quality tracing in real time to Technical innova-tion, could carry out decision-making fast and effectively to a series of plans such as buying, production and sellings.And under traditional-handwork condition, be difficult to accomplish the timely control to flow process, be therefore conducive to improving the quality of products, reducing cost of products, consummation after sales service etc. to the computerize that wheat processing enterprise realizes Technical innova-tion.
Setting up wheat processing corporate model is that it carries out the first step of information project, and modeling process guides enterprise to carry out self-recognition and oneself's adjustment.Enterprise modeling is the process of structure enterprise commerce function, company information data and the abstract model supporting enterprise's Life cycle, wherein also comprise other model describing enterprise operation state, as enterprise information model, enterprise work flow model, Enterprise Resource model etc.Enterprise modeling expresses above-mentioned model with specific Method and kit for, and supports the expression of model, analysis and maintenance etc.
In today that the modernization level of informatization of each processing and manufacturing industry generally improves, middle-size and small-size wheat processing enterprise is necessary to overcome traditional mode of production mode, setting up the information model of wheat processing factory, laying the foundation for improving wheat processing information level of the enterprise further.
Summary of the invention
The object of this invention is to provide a kind of method setting up the IDEF model of wheat processing enterprise, its IDEF model set up contains the working procedure feature of wheat processing production run, has certain versatility to wheat processing enterprise.The IDEF model of described wheat processing enterprise comprises the IDEF0 functional mode of wheat processing enterprise and the IDEF1X data model of wheat processing enterprise
According to technical scheme provided by the invention, the described method setting up the IDEF model of wheat processing enterprise is:
(1) the processing process feature according to wheat processing enterprise describes its flow process;
(2) wheat processing enterprise feature subsystem is taken out by demand analysis, the input of the box of IDEF0 model, output, control and mechanism (ICOM) is determined by enterprise's working procedure feature, by top level diagram from top under set up each subsystem, form the IDEF0 functional mode of wheat processing enterprise, and expand thus and information database, document library and IDEF0 picture library;
(3) utilize above information to carry out assistant software design, comprise database, software module and data file interface design;
(4) determine modeling border and the scope of wheat processing enterprise data model, determine the modeling entity of enterprise characteristic, contact, key and respective attributes, iterate and determine its IDEF1X data model.
The IDEF0 functional mode of described wheat processing enterprise, is divided into 7 parts, comprises: planning management by whole system, flour technical recipe manages, material management, and production operation manages, quality management, equipment control, statistics feedback.
Wherein, described flour technical recipe management, processing process and flour formula are divided into two independently parts, finally obtain based on all purpose flour of the classification under wheat, ratio of adjuvant and processing environment and condition dynamic change and tailored flour processing technology and formula, described processing environment and condition include mill and the lower temperature of mill, season, wheat soft durometer, pressure.
Step (2) is preserved extracting data characteristics, information description and figure in the IDEF0 functional mode of enterprise as set.
The process that step (4) sets up IDEF1X data model is as follows:
In the preparatory stage, determine modeling target, exploitation modeling plan, collects source material, the result that source material comprises investigation and observes, strategy and production run, and the input of original system, output, carry out border explanation to represented model;
In the definition entity stage, according to the information collected and the IDEF0 functional mode drawn out on last stage, the entity in tag system, names entity;
In the definition contact stage, whether the contact between mark and previous step definition entity, be connect contact, classification contact or non-determined contact, for the non-determined contact that may exist, need in the stage afterwards perfect further;
In the definition key stage, comprise the non-determined contact improving the definition contact stage and contact for determining, and be each substantial definition key attribute;
In the defined attribute stage, determine to define its whole nonkey attribute to identified attribute to each entity, according to the rationality of rule test attribute, and according to defined attribute, further sophisticated model.
The IDEF1X data model of described wheat processing enterprise, covers the feature process flow process of wheat processing enterprise; Specific working procedure feature in wheat processing process is extracted in production run controls, working procedure feature data, for recording and illustrate the key message of per pass production process, comprising: the stripping of screen equipment and flour mill mass flow record, flour mill is blown and flour extraction rate, sifting efficiency, flour mill power consumption, wind fortune and technique power consumption, temperature detection.
The invention has the beneficial effects as follows: the IDEF model establishing wheat processing enterprise, cover wheat processing production run feature, it has certain versatility to wheat processing enterprise.By the foundation of wheat processing enterprise IDEF model, the relevant personnel of enterprise are made fully to understand related hardware, the software and technology etc. of enterprise, the control system of Shi Quan factory forms a production management system that can intercom mutually, mutually consult, to make production commander department of enterprise can grasp more rapidly and all sidedly production run, the state of wheat processing, commander's adjusting process operational factor, carries out production scheduling and optimization in time.
Accompanying drawing explanation
Fig. 1 is that the figure of IDEF0 basic model represents.
Fig. 2 is the functional mode utilizing IDEF0 to describe wheat processing enterprise.
Fig. 3 is the IDEF0 functional mode of System of Quality Control.
Fig. 4 is lower floor's subgraph decomposition model of System of Quality Control A5.
Fig. 5 is the data model utilizing IDEF1X to describe wheat processing enterprise.
Fig. 6 is the process flow diagram of Modling model of the present invention.
Embodiment
As shown in Figure 6, the method that the present invention sets up the IDEF model of wheat processing enterprise comprises the following steps:
1. the production operation flow of wheat processing enterprise is described.
Carrying out accurate description to the operation flow of an enterprise is realize product information integration, produces the basis of correct operation flow.If lack of standardization or wrong operation flow is mapped in information space, certain conflict that data define and improper data handling procedure will inevitably be there is.
For efficient and stable wheat flour milling technique, same production line, identical raw grain, different operational administratives, will produce visibly different powder process effect.Enterprise often just can find some managerial problems in the process of carrying out operation flow description, thus is directly benefited by modified flow.
The main management activity of wheat processing enterprise comprises to be established MPS, the supply situation of holding raw grain wheat and other means of production, holds manufacturing schedule and technological process, assurance wheat and flour, the quality status of wheat bran, according to plan shipment etc.
2. analyze the production business activity of whole wheat flour milling process, utilize IDEF0 to set up functional mode, and the characteristic information of model is extracted classification set.
Functional mode is used for the target which concrete functional activity to be realized enterprise by is described, and the restriction relation between representation function activity.
IDEF0 model is mainly made up of box (Boxes) and arrow (Arrows) these two parts.
Box representative be certain function of system, function may be one action (Action), operation (Operation) or process (Processes).
Arrow represents information required in square, such as: input, output, control, mechanism etc.
In IDEF0 figure, every operation is divided into input (Input), exports (Output), controls (Control) and mechanism (Mechanism), and the being associated with each other property between function is decomposed further, acquisition that therefore can be correct and express the function of flow process and descriptive system.The figure of IDEF0 basic model represents as shown in Figure 1.
The input of using the IDEF0 modeling method improved to describe production run, export, control, in the processing procedure of mechanism, function is successively decomposed to and can not segment, each bottom box represents a most basic function, each bottom input, export, control, scheme information represents a set of simple information or simple information, and all result (graphical informations, IDEF0 figure and document) all will be kept at information database, IDEF0 picture library, in document library, information database is basic, picture library generates according to information bank, document library is generated by information bank part, they realize all in computer systems, which, these information can be utilized to carry out the primary design of software.
3. by carrying out the Computer Aided Design of previous step prototype software, comprise design database, data in database can be divided into external data and internal data (data that software self produces), and design key is the E-R figure in design database, are divided into entity design and the design of entity annexation; Carry out the design of software module, comprise element module (system minimum module) and high-rise modular design (element module set); The design of external interface.
4. study the corresponding statistics of wheat processing enterprise, utilize IDEF1X to set up the data model of wheat processing enterprise.
The input and output relation of information between just each activity that functional mode is expressed, and the relation of inclusion of information, can't give expression to the definition of data and the definite incidence relation of data.Data model is object business data being abstracted into computer-internal DBMS management, and it defines data by semantic data model technology from conceptual view, determines that the implication of data is to describe activity and the achievement of production management.
Planned by business data, division business data is status data, condition excitation data, planning data etc., analyze entity object and the contact of enterprise, just can arrange out data model, data mart modeling requirement and the effect to business decision, by the analysis to business data class, set up IDEF1X data model.Utilize the process of IDEF1X modeling as follows:
In the preparatory stage, determine modeling target, exploitation modeling plan, collects source material, the result that source material comprises investigation and observes, and strategy and production run, the input and output etc. of original system, carry out border explanation to represented model.
In the definition entity stage, according to the information collected and the IDEF0 functional mode drawn out on last stage, the entity in tag system, names entity.
In the definition contact stage, whether the contact between mark and previous step definition entity is connect contact, and classification contact, or non-determined contact, for the non-determined contact that may exist, need in the stage afterwards perfect further.
In the definition key stage, the non-determined contact improving the definition contact stage, for determining contact, is each substantial definition key attribute etc.
Defined attribute is the final stage of modeling, determine to define its whole nonkey attribute to identified attribute to each entity, according to the rationality of rule test attribute, and according to defined attribute, and further sophisticated model.
Above step is used finally to set up functional mode towards wheat processing enterprise and data model.
By the improvement to enterprise IDEF0 model, solve some drawbacks of its traditional structure fractional analysis method, the simple figure of usual IDEF0 represents very inconvenient, information of searching is comparatively difficult, also there is uncertain and incomplete feature, cause the disconnection with practical application, by improving, add data message storehouse, document library and shape library, thus IDEF0 model information can be obtained more easily and carry out Software for Design.
Set up production system data model with data definition, information, process, analysis for main clue, centre can provide man-machine conversation window to meet the needs managed the dynamic change produced in wheat processing production run, by determining that the detailed decomposition of annual plan and Task carrys out accurate instruction and produces running; By to the technological process of flour processing and the definition of working procedure feature data, the need of production of different phase can be met flexibly; Controlled by production run, record each process stages characteristic and equipment operation condition, correctly can add up processing situation, management enterprise device resource, adjusting stage production operation in time and the plan of feeding intake; By concerned process steps historical record can be checked in time, exactly to the analysis of working procedure feature data, the reason of search quality, determine responsibility; By relatively accurate demand and the consumption determining raw grain wheat and formulation auxiliaries of technical recipe energy of flour; By providing pattern analysis and report tool can carry out data summarization, formed the information that enterprise produces and decision-making is useful.
Below in conjunction with drawings and Examples, the present invention will be further described.
Before modeling, investigate based on to the system of wheat processing enterprise, the production procedure describing out wheat processing enterprise in detail basic is as follows:
1. enterprise is according to market forecast, customer order and productive capacity establishment Annual sales plan and manufacturing program of a year, according to manufacturing program of a year and the production line repair establishment manufacturing program of a month of full factory;
2. assign to workshop by monthly plan, workshop by Task-decomposing and establishment production schedules according to production line beat, flour process condition and equipment resource information, is assigned the production schedule, is generated quality monitoring plan and equipment maintenance plan simultaneously.
3. to put into production line according to the requirement of production schedules, wheat flour finished product can be divided into grade flour and tailored flour.Standard flour wheat, after grinding processing, namely becomes flour, also claims wheat flour.Flour is divided into the large class of all purpose flour and tailored flour two by machining precision is different with purposes: (1) all purpose flour: be divided into special grade flour, standard flour, common flour three class by machining precision is different; (2) tailored flour: tailored flour is the flour utilizing special kinds wheat to grind; Or according to the needs of application target, the basis of grade flour adds edible whitening agent, edible leavening agent, flavoring essence and other compositions, mix and the flour made.According to the difference of production plan, enterprise sets different technological processes, produces the grade flour of different accuracy.Secondly, for the tailored flour of order requirements, determine technical recipe on request by research and development department, with determine inventory number.Namely by what time above, production plan, flour formula and integrated artistic flow process can determine the workshop plan of feeding intake.
4. because flour product architectural characteristic is unstable, easily be affected by the external environment, quantitative relation on it between stage material and lower stage material may be different and different with temperature (entering to grind temperature, the lower temperature of mill, flour packing temperature), pressure, humidity (wheat soft durometer, wheat wetting flow process), season, Personnel Skill Levels, process conditions, and formulation management is mainly used to determine wheat and adjuvant quantity required and its consumption of calculating.
5. workshop flour processing technological process, determine between the procedure of front and back relation, and time interval of per pass processing, tempering times etc. can be defined by Technological Process Management.
6. working procedure feature data are for recording and illustrate the key message of per pass production process; interocclusal record when comprising startup-shutdown; screen equipment and flour mill mass flow record; the stripping of flour mill is scraped and flour extraction rate; sifting efficiency, flour mill power consumption, wind fortune and technique power consumption; temperature detection, is mainly used in quality monitoring and tracking, production leadtime, workshop examination etc.
7. production run controls joining wheat ratio and quantity, join the information such as powder ratio and quantity, workshop processing, equipment operation and control production run and feed back under essential record different process formula, adjusts production schedules and the workshop plan of feeding intake.
8. equipment resource management mainly determines equipment state, equipment logout, maintenance record, servicing time, simultaneously according to the history maintenance record of equipment, scheduled maintenance time and the maintenance schedule of production schedules determination workshop appliance.
9. the statistics feedback of producing mainly adds up the output of flour, wheat bran, flour extraction, flour quality, ton powder power consumption, the consumption of materials, according to the information of statistics, instructs and works out and the adjustment production schedule.
10. quality monitoring is mainly according to concerned countries standard, manufacturing procedure quality standard, monitors the key message in production run, comprises wheat buying ware-house-in inspection, flour quality inspection, secondary product quality inspection etc.; Quality tracing is by wheat batch, product batches to the flour gone wrong, context between inter process interval and operation follows the trail of operation historical data, also can conclude the factor producing quality problems according to enterprise simultaneously, form quality tracing factor table and carry out quality tracing.
The modeling object of next clear and definite wheat processing corporate model and principle, thus select suitable modeling method.
Usually no matter the modeling method adopted how, and enterprise information model is all made up of the entity in determined problem domain, and carry out the information in criterion problem field according to entity, relation between attribute and entity.But because different modeling methods has different emphasis, thus appropriate modeling method to be selected according to actual modeling object and demand before actual modeling.Mainly utilize IDEF0 and the IDEFlX method in IDEF modeling systems to design functional mode and the data model of wheat enterprise respectively herein, and it is expanded and fringeware design.
(1) wheat processing enterprise functional mode and expand and fringeware design
IDEF0 is the modeling method obtained by structural workflow net.This model is made up of a series of figure.
An IDEF0 model can be expressed as set:
IDEF0={(Acti,Ini,,Coni,Outi,Mechi)|i=l,2…,n}
Each element of set can by five element representations.Wherein, Acti is activity name, and Ini is input set, and Coni is for controlling set, and Outi is output set, and Mechi represents mechanism set.
The model of a subsystem can be expressed as set:
Msub={(Subi,Mii,Iii,Ioi,Moi,Suppi)|i=1,2,…,n}
Each element of set can be stated by six elements.Wherein, Subi is subsystem name, and Mii is material inputs set, and Iii is information input set, and Ioi is information output set, and Moi is material output set, and Suppi is mechanism set.
In modeling process, from the view point of the overall situation, be conceived to operation and the activity in production of whole wheat processing enterprise, adopt the method under from top, system function requirement is analyzed and refinement, mark off each functional subsystem, the input of every function, export, the IDEF0 descriptive language that constraint condition and realization mechanism are changed in the form describes out, as the foundation of system, and the demand relation of each functional subsystem is made around the general objective of complex automatic system, avoid each functional subsystem to stand in self position and analyze requirement, to ensure to realize over all Integration.The system functional model set up will point out what function is system should complete, and should process what problem, and point out how this function should complete, and how this problem should process and realize etc.
The groundwork step of the IDEF0 modeling that wheat processing enterprise improves is comprised:
A. wheat enterprise related procedure further investigation in previous step, analyze and refinement the functional requirement of wheat enterprise, appropriate section can divide and integrate, determine whole system to be divided into 7 functional subsystems, comprise planning management, flour technical recipe manages, material management, production operation manages, quality management, equipment control, statistics feedback, these activities pin down mutually, acting in conjunction, ensure that carrying out smoothly of whole activity in production.More than determining that research range is, will decompose further afterwards.
B. the context diagram A-0 of system is set up, the context diagram of system is used for describing abstractively studied problem and border thereof or data-interface, it, with a box indicating, writes described content in square frame, represent the data-interface of System and Surroundings with arrow.
C. then set up top level diagram A0 again, input the title of each box, input, output, control, mechanism in detail.A0 figure is obtained by A-0 decomposition, and it illustrates schemes same scope and details with A-0, clearly have expressed the implication that A-0 figure illustrates, reflects the viewpoint of model from structure.
The IDEF0 model built as shown in Figure 2, below will be set forth subsystems.
A1 planning management, input in project management system be wheat enterprise receive change release, self marketing plan and the maintenance of equipment information fed back by equipment control department, in relevant market situation, under the constraint of national policy and manufacturing recourses balance, by production schedule portion, accounting division completes jointly in conjunction with enterprise computer system, finally forms MPS.According to wheat flour processing flow process, its flow process primarily of raw grain dressing shop and silo, wheat flour milling workshop, join powder workshop, flour storehouse, secondary product storehouse, packing storehouse jointly complete.Formed the Task-decomposing in multiple workshop by planning management, formulate MRP, form production schedule program.
A2 flour technical recipe manages, flour demand type is relatively fixing, therefore research and development of products can, according to customer order requirement, be considered on the basis of target cost, external environment and manufacturing recourses, by formula for a product and required technological process, form specific formulation management system.Mainly comprise all purpose flour processing technology, different classes of tailored flour processing technology and make the stabilized formulations of specific tailored flour.
A3 material management is formed on the basis of MPS, under MRP constraint, forms appropriate inventory information and procurement plan table as required, be mainly raw grain wheat by purchasing department, auxiliary material and other parts.
The various fluor producing process that the production schedule progress that is input as of A4 production operation management, the management of flour technical recipe are formed and formula, production line beat and working procedure feature parameter, under the constraint of manufacturing recourses, generate clear wheat and powder process production plan, powder process and join the powder plan of feeding intake, and key message record is carried out to production run.
A5 quality management, quality problems are lifelines of wheat processing enterprise, compare other manufacturings, and its product quality problem seems particularly important.
With reference to the quality management operation flow of general enterprises, quality information management system should be able to realize eight and apply greatly: the collection of the Basic Information Management of quality, inspection plan, control plan, various Quality Checkout Data and management, unacceptable product manage, Report Server Management, qualitative data statistical study, equipment etc. maintenance management.Each system application realizes respectively respectively in basic information management module, planning management module, information acquisition module, quality problems administration module, statistical analysis module, device management module and system management module above.Modules performs respective function, has the transmission of data and shares, avoid the typing repeatedly of data, ensure that accuracy and the uniqueness of data between disparate modules.
A6 equipment control, according to the parts inventory information of enterprise and procurement plan, equipment increase and decrease transition information, equipment control department forming device account, equipment maintenance plan, corrective maintenance plan.
A7 adds up feedback, and according to production run record and technique examination parameter, its constraint condition is production schedules and the plan of feeding intake, and the result of statistics is mainly the output of flour, wheat bran, flour extraction, flour quality, ton powder power consumption, the consumption of materials.
D. according to top-down method, from A0 figure, Function Decomposition is carried out further to some subsystems and successively decomposes, set up a series of animated graphs, until lowermost layer.For " A5 quality management " module, carry out decomposing to lower floor, 4 the box A51 quality plannings being divided into Fig. 4 by Fig. 3 quality management module manage, A52 quality information gathers, A53 statistical analysis of quality and the management of A54 quality problems, input each box title respectively, input, output, control and mechanism.
E. combine the functional mode set up, obtain IDEF0 icon data information and comprise:
The title of box, numbering, description, its numbering in father figure and position, its figure level, picture information.Data comprise its input, output, control, mechanism, arrow quantity and content; The input title of input, numbering, description, father input numbering, son input, corresponding box numbering; The output title exported, numbering, description, father export numbering, son exports, corresponding box numbering and input thereof, control, mechanism numbers; The control title controlled, numbering, description, father control numbering, son control, corresponding box numbering; The machine-processed title of mechanism, numbering, description, father's mechanism numbering, handset system, corresponding box numbering.
To the multiple outputs in a figure, input, control, mechanism and and merge into the situation of, regard one as at native system.
Be document to the file of the detailed description of information in the IDEF0 obtained, document store path root node is doc, divides into node box, control, output, input and monitor.Tree-like document library is built by numbering separately.
The IDEF0 figure obtained comprises concrete 5 parts of each box-shaped structure.
Generate all IDEF0 according to data message library information to scheme, set up the tree structure of whole shape library by box numbering, a box number generates corresponding box file folder and graphic file.The sub-graph of a correspondence of file depository box, file folds up the IDEF0 figure of sub-box.
F. the IDEF0 model information in previous step after expansion can be applied in the design of following software.
In database design, the data needed are divided into external data and internal data (data that software self produces), what solve here is that software self produces and the data problem of Long-Time Service, and external data problem is solved by external interface design afterwards.The design key of database is E-R figure of how design database.The design of E-R figure can be summarized as two steps: entity design and the design of entity annexation.Entity design designs formation entity attribute according to the data in database and the document in document library, and entity attribute is exactly that unit exports (the output element that can not decompose again).
Entity design step is: (1) selects physical name.(2) select to belong to this entity attributes in community set, obtain the community set under physical name and this entity.All entities form entity sets.
A physical name is selected in the design of entity relationship, selects relative entity according to inter-entity relation, and mark association type, obtains entity relationship.Final E-R the figure obtaining system.The physical database of this software can be set up thus in database SQL Sever 2000 by Library Construction Kit [Microsoft FoxPro] Power Designor.
The element module design of Software Module Design according to programming requirements design input, export (as type, word length, constraint condition etc.), according to the algorithm of control design case element module, processing and treating method and step: according to the configuration of Mechanism Design software.Namely high-rise module forms high-rise module by relevant element module set, and then the larger module of generation is subsystem etc.
The outside input of the different input mode of external interface design consideration, the design such as external data base, keyboard, request input respective external interface.
By above step can make functional module convenient be transitioned into general design of software, play the effect of functional module.Meanwhile, relevant design document can be preserved on computers.
(2) data model of wheat processing enterprise
Utilizing on the IDEF0 method establishment basis of system functional model, recycling IDEFIX method, according to certain step, by the optimization that iterates, determine the entity relevant to wheat processing process information integration system and contact, and define key and the nonbonding attribute of each entity, thus set up its data model.
Below just according to modeling principle and the modeling program of IDEF1X, this process is analyzed.
A. border and scope is determined
In conjunction with the actual conditions of wheat processing enterprise, the scope involved by information integrated system be to plan in enterprise, produce, manage, data that the department such as quality inspection is relevant and operation flow.
B. entity is defined
First will on the basis of system global structure design, according to the coverage rate of functional requirement, to determine in wheat processing Enterprise Integration System the entity of required definition, entity should be described, and has N number of example, and should separate with attribute area.
In the production run of wheat processing enterprise, such as, " flour formula " is defined as an entity, then
Can obtain its relational model is:
R. formula for a product (production code member, name of product, operation title, stock number, material type, joins wheat ratio, joins powder ratio, using state ...)
C. contact is defined
One " contact " can be simply defined as the one association of two inter-entity or connect.Specifically, this is called binary contact.IDEF1X is limited to binary contact, be because they contact more first in N is easier defines and understand.
Such as, according to the record to concrete working procedure feature data in " production run control ", can obtain the quality tracing situation of major-minor product flour and wheat bran, the two is contact of not exclusively classifying.
D. definition key: this stage is each substantial definition key attribute in system, expands and the definition improving entity He contact.For wheat processing enterprise integration information system, be each substantial definition major key of relating to and external key.As: in " equipment maintenance plan " entity, definition " production wire size " is major key, and to identify this entity uniquely, definition " device numbering " is external key, to determine and the contacting of other entities.
E. defined attribute: along with the mark of key, entity attribute pond be configured in the last stage just oneself through starting.The object in this stage is exactly extended attribute pond, to comprise nonbonding attribute.Collect those vital attribute-name, and distribute a unique identification number for it.As " device name " and " specifications and models " be very important attribute concerning an equipment.Finally, this kind of attribute assignment to owner's entity.As above-mentioned two attribute assignment are given " equipment resource management " entity, thus improve entity attributes.
The foundation of wheat processing enterprise data model launches step by step according to above-mentioned steps.Production management based on enterprise is actual, considers, local refinement in the overall situation, on the basis of successively specification, establishes the overall information model of system, as shown in Figure 5 according to the modeling principle of IDEFIX method and program.Comprise all entities and its contact in figure, from production line to administration and supervision authorities, and this information model is perfect, namely there is not non-determined contact.
To sum up, wheat processing enterprise IDEF0 model and Software for Design are linked up and are well enhanced applicability, with enterprise data model build can jointly Optimization of Wheat processing enterprise flow process and accelerates informatization speed, to implement Enterprise Resources Plan provide powerful guarantee.
Claims (6)
1. set up the method for the IDEF model of wheat processing enterprise, it is characterized in that: the IDEF model of described wheat processing enterprise comprises the IDEF0 functional mode of wheat processing enterprise and the IDEF1X data model of wheat processing enterprise, and the foundation of model comprises the steps:
(1) the processing process feature according to wheat processing enterprise describes its flow process;
(2) wheat processing enterprise feature subsystem is taken out by demand analysis, the input of the box of IDEF0 model, output, control and mechanism is determined by enterprise's working procedure feature, by top level diagram from top under set up each subsystem, form the IDEF0 functional mode of wheat processing enterprise, and expand thus and information database, document library and IDEF0 picture library;
(3) utilize above information to carry out assistant software design, comprise database, software module and data file interface design;
(4) determine modeling border and the scope of wheat processing enterprise data model, determine the modeling entity of enterprise characteristic, contact, key and respective attributes, iterate and determine its IDEF1X data model.
2. set up the method for the IDEF model of wheat processing enterprise as claimed in claim 1, it is characterized in that: the IDEF0 functional mode of described wheat processing enterprise, whole system is divided into 7 parts, comprise: planning management, flour technical recipe manages, material management, production operation manages, quality management, equipment control, statistics feedback.
3. set up the method for the IDEF model of wheat processing enterprise as claimed in claim 2, it is characterized in that: described flour technical recipe management, processing process and flour formula are divided into two independently parts, finally obtain based on all purpose flour of the classification under wheat, ratio of adjuvant and processing environment and condition dynamic change and tailored flour processing technology and formula, described processing environment and condition include mill and the lower temperature of mill, season, wheat soft durometer, pressure.
4. set up the method for the IDEF model of wheat processing enterprise as claimed in claim 1, it is characterized in that: step (2) is preserved extracting data characteristics, information description and figure in the IDEF0 functional mode of enterprise as set.
5. set up the method for the IDEF model of wheat processing enterprise as claimed in claim 1, it is characterized in that: the process that step (4) sets up IDEF1X data model is as follows:
In the preparatory stage, determine modeling target, exploitation modeling plan, collects source material, the result that source material comprises investigation and observes, strategy and production run, and the input of original system, output, carry out border explanation to represented model;
In the definition entity stage, according to the information collected and the IDEF0 functional mode drawn out on last stage, the entity in tag system, names entity;
In the definition contact stage, whether the contact between mark and previous step definition entity, be connect contact, classification contact or non-determined contact, for the non-determined contact that may exist, need in the stage afterwards perfect further;
In the definition key stage, comprise the non-determined contact improving the definition contact stage and contact for determining, and be each substantial definition key attribute;
In the defined attribute stage, determine to define its whole nonkey attribute to identified attribute to each entity, according to the rationality of rule test attribute, and according to defined attribute, further sophisticated model.
6. set up the method for the IDEF model of wheat processing enterprise as claimed in claim 1, it is characterized in that: the IDEF1X data model of described wheat processing enterprise, cover the feature process flow process of wheat processing enterprise; Specific working procedure feature in wheat processing process is extracted in production run controls, working procedure feature data, for recording and illustrate the key message of per pass production process, comprising: the stripping of screen equipment and flour mill mass flow record, flour mill is blown and flour extraction rate, sifting efficiency, flour mill power consumption, wind fortune and technique power consumption, temperature detection.
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