CN112669081A - Rapid building cost estimation method and system - Google Patents
Rapid building cost estimation method and system Download PDFInfo
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Abstract
The application relates to a rapid building cost estimation method and a system, which comprises the steps of constructing a building cost result library; inputting project characteristics of a project to be manufactured; inputting cost data known by a cost maker in the project characteristics; obtaining the project characteristics with unknown cost data; searching the construction cost result library for construction cost data of project characteristics similar to the project characteristics of which the construction cost data are unknown, and endowing the searched construction cost data with corresponding project characteristics; and outputting an estimation result. The cost engineer inputs cost data which can be estimated by the cost engineer into corresponding project characteristics, and cost data of other project characteristics are provided by similar projects. The method and the device have the effects of being convenient for reducing the building cost estimation error, being beneficial to improving the accuracy of the estimation result, having high estimation efficiency and being capable of estimating the building cost estimation price of the special building project.
Description
Technical Field
The application relates to the field of building cost, in particular to a rapid building cost estimation method and system.
Background
The construction cost generally refers to the cost for performing a certain project construction, i.e., the total cost from the construction to the completion acceptance. It is composed of construction and installation engineering cost, equipment and instrument purchase cost, other engineering construction cost, preparation cost and tax. Prior to the start of a construction project, a costing engineer is typically required to estimate the cost of the construction project to estimate the profit or risk factor of the construction project.
The construction cost estimation in the related technology is that one or more cost operators estimate the price of each item according to own experience to finally obtain an estimation result.
In view of the above-mentioned related technologies, the inventor considers that the experience of the construction engineer is limited, and the construction project which is not familiar to the inventor is inevitable, and the estimation result obtained by the construction engineer has a large error.
Disclosure of Invention
In order to reduce the building cost estimation error and improve the accuracy of the estimation result, the application provides a rapid building cost estimation method and a rapid building cost estimation system.
In a first aspect, the present application provides a method for rapidly estimating construction cost, which adopts the following technical scheme:
a rapid building cost estimation method comprises the following steps;
constructing a building cost result library;
inputting project characteristics of a project to be manufactured;
inputting cost data known by a cost maker in the project characteristics;
obtaining the project characteristics with unknown cost data;
searching the construction cost result library for construction cost data of project characteristics similar to the project characteristics of which the construction cost data are unknown, and endowing the searched construction cost data with corresponding project characteristics;
and outputting an estimation result.
By adopting the technical scheme, the cost engineer inputs the cost data which can be estimated by the cost engineer into the corresponding project characteristics, and the cost data of other project characteristics are given by the cost data in the corresponding project characteristics in the project similar to the project to be estimated. The method is convenient for improving the estimation efficiency, a construction cost engineer only fills in construction cost data which can be accurately estimated by himself, and other data are matched by big data, so that the method is convenient for reducing the construction cost estimation error and improving the accuracy of the estimation result.
Optionally, the step of constructing a building cost result library includes:
constructing a plurality of achievement province level databases by taking provinces as classification standards;
constructing a plurality of corresponding achievement city level databases in the achievement province level database by taking a city as a classification standard;
and summarizing project characteristics of known projects which are subjected to acceptance inspection and cost data corresponding to the project characteristics in a corresponding achievement market database.
By adopting the technical scheme, the known items which are checked and accepted are classified and stored according to provinces and cities, so that the retrieval efficiency during later retrieval is improved, and the estimation efficiency is improved. And secondly, the method is helpful for a costist to summarize the cost price difference of similar building items between provinces and the cost price difference of similar building items between cities of the same province, so that the costist can conveniently provide more accurate cost data for the item characteristics in the item to be estimated, and the building cost estimation error is reduced.
Optionally, the project characteristics include at least building time, number of building floors, floor space, building structure, house structure, and total cost of human resources and machinery.
By adopting the technical scheme, similar projects of the project to be estimated of the construction cost are retrieved according to information such as construction time, building floor number and floor area of the construction project, so that the method is more reasonable and scientific, and contributes to reducing the estimation error of the construction cost and improving the accuracy of the estimation result.
Optionally, the step of retrieving, from the building cost result library, cost data of project features similar to the project features for which cost data is unknown, and assigning the retrieved cost data to corresponding project features includes:
searching the achievement market level database corresponding to the province and the city of the project to be cost estimated from the achievement database;
retrieving said known accepted projects similar to said project to be assessed for cost from said corresponding achievement market level database;
and endowing the cost data of the corresponding project characteristics in the known project which is subjected to acceptance inspection to the project characteristics of which the cost data is unknown in the project to be evaluated.
By adopting the technical scheme, the cost of the man-machine in the same city is more similar, and the estimation error is reduced, so that the accuracy of the estimation result is improved conveniently.
Optionally, the step of determining the known items of completed acceptance that are similar to the item of estimated cost comprises:
at least the building time, the building number of layers and the building structure in the project characteristics of the known acceptance inspection completion project are the same as the corresponding project characteristics of the project to be cost estimated; if a plurality of known items which are checked and accepted are judged to be similar items, selecting the known items which are checked and accepted and have the same item characteristics as the items to be estimated for the cost and the largest quantity as the similar items;
otherwise, selecting the known items which are the same as the corresponding item characteristics of the items to be estimated in the construction layer number and the construction structure in the item characteristics and are closest to the construction time of the items to be estimated as similar items;
otherwise, retrieving the known accepted projects similar to the project to be estimated in the building cost result library.
By adopting the technical scheme, when a plurality of building projects with the same building time, building floor number and building structure as the project characteristics corresponding to the project to be cost estimated are in the achievement city level database, the similar building project with the same project characteristics and the largest quantity is selected; and if the construction time is not the same as the project to be estimated, selecting the construction project with the latest time and completed acceptance. Otherwise, similar items are searched in the building cost result library, and the method is scientific and reasonable and is convenient for reducing building cost estimation errors.
Optionally, the step of retrieving the known approved projects similar to the project to be cost-estimated from the building cost results repository comprises:
constructing a city classification database, storing city names of all cities in the country and the latest one-year GDP values corresponding to the city names;
each city name is independently divided into a group, and the city names with GDP values not more than ten percent of the GDP values of the city names are added into the group;
preferentially searching similar projects in a corresponding result city level database of a city in the same group as the city to which the project to be cost estimated belongs; otherwise, similar items are searched in other achievement market level databases.
By adopting the technical scheme, when similar projects are searched in other achievement market level databases, the city which is not much different from the economic development of the city to which the project to be estimated is belonged is preferentially selected, so that the difference between the cost of human and machine is conveniently reduced, a costist can conveniently compensate or modify the obtained estimation result in the later period, the error is reduced, and the accuracy of the estimation result is improved.
Optionally, the system further comprises a cost engineer contact information database which stores contact information of a plurality of cost engineers;
when no similar project exists in the construction cost result library, acquiring the contact way in the construction cost engineer contact way database, and sending all project characteristics of the project to be estimated to the construction cost operators;
and acquiring cost data transmitted by a cost engineer, averaging the cost data corresponding to each project characteristic, and endowing the corresponding average value to the corresponding project characteristic.
By adopting the technical scheme, if no similar project exists, information is sent to a plurality of cost operators, and the obtained cost data are averaged. On one hand, even if the building cost result library has no similar projects, the estimation result can be obtained, so that the estimation method is suitable for special building projects. On the other hand, the averaging method is favorable for reducing the building cost estimation error and improving the accuracy.
Optionally, after all the project characteristics of the project to be estimated are sent to each construction cost engineer, if the construction cost data is not obtained, information is sent to the construction cost engineer once in a period of time.
By adopting the technical scheme, the method is helpful for urging each costist to quickly obtain the cost data of each project characteristic, and the estimation efficiency is improved. More cost data can be obtained conveniently, and the accuracy of the estimation result is improved.
Optionally, the estimation result at least includes the estimated price of the item to be cost-estimated and the item name of the item to which the item feature similar to the item feature in the item to be cost-estimated belongs.
By adopting the technical scheme, related responsible persons can trace the data root conveniently.
In a second aspect, the present application provides a rapid building cost estimation system, which adopts the following technical solution:
a rapid building cost estimation system comprising:
the manufacturing cost achievement database module is used for storing known project data of the project which is checked and accepted;
the acquisition module is used for acquiring the project characteristics of the project to be cost-estimated; and is also used for obtaining the cost data of the project characteristics known by the cost engineer;
the processing module is used for obtaining project characteristics with unknown manufacturing cost data; the system is also used for retrieving the cost data of the project characteristics similar to the project characteristics of which the cost data is unknown from the building cost achievement database module and endowing the retrieved cost data with the corresponding project characteristics;
and the output module is used for outputting the estimation result.
By adopting the technical scheme, a construction cost engineer inputs construction cost data of project characteristics with high estimation accuracy, the acquisition module acquires the construction cost data, and then the processing module retrieves similar projects to match missing construction cost data.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the cost engineer inputs cost data that the engineer can estimate into the corresponding project characteristics, and cost data of other project characteristics is given by cost data in corresponding project characteristics in a project similar to the project to be estimated. The estimation efficiency is improved conveniently, the estimation error of the construction cost is reduced, and the accuracy of the estimation result is improved;
2. similar items of the project to be estimated of the construction cost are retrieved according to information such as construction time, the number of building layers and floor area of the construction project, and the similar items are more reasonable and scientific, so that the construction cost estimation error is reduced, and the estimation result accuracy is improved;
3. similar items are preferentially searched in the same city, the human-machine cost in the same city is more similar, the estimation error is reduced, and the accuracy of the estimation result is improved conveniently.
Drawings
FIG. 1 is a block flow diagram of a method for rapid building cost estimation;
FIG. 2 is a block diagram of a process for constructing a building cost result library in a rapid building cost estimation method;
FIG. 3 is a flow chart of a rapid building cost estimation method for retrieving similar items;
FIG. 4 is a block diagram of a rapid building cost estimation system.
Description of reference numerals: 1. a building cost achievement database module; 2. an input module; 3. a processing module; 4. and an output module.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
Known approved projects refer to construction projects that have been completed and approved;
the project to be estimated is a building project which needs to be estimated by using the rapid building cost estimation method in the application;
the item characteristics refer to items which are necessary and/or required to be subjected to price estimation in the price estimation of the construction cost, such as labor cost, material cost and mechanical equipment lease cost;
the building time refers to the time when a building project starts construction or the time when the construction is planned to start;
the number of building floors refers to the total number of buildings in a building project, for example, if there are 3 floors underground and 7 floors above the ground in the building project A, the number of building floors in the building project A is 10;
the floor area refers to the floor building area of a building in a building project;
the building structure refers to materials used for buildings, and comprises a concrete structure, a steel structure, a masonry structure and a wood structure;
the house type structure refers to the structure and shape of a residential building, such as a three-room two-hall structure, a two-room two-hall structure.
The embodiment of the application discloses a rapid building cost estimation method.
Referring to fig. 1, the rapid building cost estimation method includes S100, constructing a building cost result library;
s200, inputting project characteristics of a project to be manufactured;
s300, inputting cost data known by a cost maker in the project characteristics;
s400, obtaining project characteristics with unknown manufacturing cost data;
s500, searching the construction cost result library for construction cost data of project features similar to the project features of which the construction cost data are unknown, and endowing the searched construction cost data with corresponding project features;
and S600, outputting an estimation result.
Referring to fig. 2, constructing a building cost result library includes:
s110, constructing a plurality of achievement province level databases by taking provinces as classification standards;
and (3) constructing a result province database according to the provinces, wherein each result province database is named by the name of the corresponding province, so that the resolution and the retrieval are convenient.
S120, constructing a plurality of corresponding achievement city level databases in the achievement province level database by taking cities as classification standards;
and constructing a result market database according to the existing cities in each province, wherein the result market databases of the cities in the same province are all located in the result province database of the province.
And S130, summarizing the project characteristics of the known project which is subjected to acceptance inspection and the corresponding cost data in the corresponding achievement market level database.
The project characteristics at least include building time, building floor number, floor space, building structure, house type structure and total cost of man-machine. And each project characteristic in each building project corresponds to the cost data. Wherein, the known items for completing acceptance check can be obtained through the internet, and all the cost data can be obtained through the internet. In addition, construction projects and corresponding cost data may also be obtained from cost-related enterprises. The building cost achievement database can be an HBase database or an MYSQL database and is used for storing building projects and corresponding cost data.
Referring to fig. 1, the project characteristics of unknown cost data obtained in S400 can be obtained through manual screening, or through program or software screening by a processor. The project characteristics with unknown cost data mean all project characteristics in the project to be cost-estimated, except the project characteristics matched with the cost data. For easy understanding, for example, there are 50 project characteristics in a certain project a to be cost-estimated, wherein cost data of 30 project characteristics are known from cost operators and are matched one by one, and the project characteristics for which cost data is unknown refer to the remaining 20 project characteristics.
Referring to fig. 1 and 3, the method of obtaining cost data of project features for which cost data is unknown, that is, S500, retrieving cost data of project features similar to the project features for which cost data is unknown from a building cost result library, and assigning the retrieved cost data to corresponding project features includes:
s510, retrieving a result city level database corresponding to the province and the city of the project to be cost estimated from the result database;
and searching a corresponding achievement market database according to the province and the city to which the project to be manufactured belongs.
S520, searching known items which are similar to the items to be estimated for the cost and complete acceptance in the corresponding achievement market level database;
namely, the construction projects similar to the project to be estimated are searched in the achievement market level database. The step of judging whether the building project and the project to be estimated of the cost are similar projects comprises the following steps:
referring to fig. 4, at least the building time, the number of building floors, and the building structure among the known project characteristics of the acceptance-completed project are the same as the corresponding project characteristics of the project to be cost-estimated at S521.
That is, only when the building time of the building project is the same as that of the project to be estimated, the number of building floors is the same as that of the project to be estimated, and the building structure is the same as that of the project to be estimated, it is determined that the building project is a similar project to the project to be estimated.
If a plurality of known items which are checked and accepted are all similar items in the corresponding achievement city level database, S522 is executed, and the known items which are checked and accepted and have the same item characteristics as the items to be manufactured and have the largest quantity are selected as the similar items; otherwise, S523 is executed, the known items which are the same as the corresponding item characteristics of the items to be estimated for the cost, in the item characteristics, in the number of building layers and the building structure, and are closest to the construction time of the items to be estimated for the cost are selected as similar items.
If a plurality of similar items are obtained after executing S523, then S522 is executed; otherwise, S530 is executed, and the known items which are similar to the item to be estimated are searched in the construction price result library. And if at least one similar project is obtained after S522 is executed, matching the cost data to the corresponding project characteristics of the project to be estimated according to the averaging mode.
In executing S530, the principle and method of judging similar items are the same as those in S520. If no similar item is obtained after S530 is executed, S550 is executed.
Specifically, referring to fig. 3, S530 includes:
s531, constructing a city classification database, and storing city names of all cities in the country and the latest one-year GDP values corresponding to the city names;
if the city classification database already exists, the existing city classification database is directly used; workers need to regularly maintain the city classification database, and the GDP value of each city in the latest year is updated. In addition, the GDP value corresponding to each city name in the city classification database can be automatically updated to the latest state through the Internet.
S532, dividing each city name into a group independently, and adding the city names with the GDP value not more than ten percent of the GDP value of the city names into the group;
for easy understanding, for example, if there are 3 cities in the building cost result library, the city name is A, B, C, 3 groups are established, and the group names are A, B, C respectively. If the GDP value of city A is 100, the GDP value of city B is 50, and the GDP value of city C is 95. Then B is added to the group of city a and a is added to the group of city B.
S533, preferentially searching similar projects in a corresponding result city level database of a city which is in the same group with the city to which the project to be cost estimated belongs; otherwise, similar items are searched in other achievement market level databases.
That is, if the city to which the project to be cost-estimated belongs is A, similar projects are preferentially searched in the achievement city level database corresponding to the city B. Otherwise, searching in other achievement market level databases.
If the similar project is searched, S540 is executed, and the cost data of the known project feature corresponding to the project feature in the project which is checked and accepted is given to the project feature of which the cost data is unknown in the project to be evaluated.
And if the similar items are not searched, executing S550, constructing a cost engineer contact information database, acquiring contact information in the cost engineer contact information database, and sending all item characteristics of the items to be estimated to the cost engineers.
The cost engineer contact information database stores a plurality of cost engineer contact information, and the contact information at least comprises a mobile phone number and can also comprise a micro signal, a mailbox and a fixed telephone number. And sending all project characteristics of the project to be cost-estimated to each cost engineer through a short message editor or a WeChat message pushing program, after receiving the message, the cost engineers estimate the project characteristics to form cost data, and returning the cost data. The returned cost data can be recovered through manual statistics or automatic statistics through a processor.
And after the cost data transmitted by the cost engineer is acquired, S560 is executed, the cost data corresponding to each project characteristic is averaged, and the corresponding average value is given to the corresponding project characteristic. And completing the filling of the cost data, thereby completing the estimation of the project to be estimated. If the cost data transmitted by the cost engineer is not obtained, S570 is executed, and information is sent to the cost engineer once in a period of time. The system is used for reminding a costist that the cost data with project characteristics are not obtained, so that the costist is supervised to process in time.
Referring to fig. 1, the estimation result includes at least the estimated price of the item to be cost-estimated and the item name of the item to which the item feature similar to the item feature in the item to be cost-estimated belongs.
The implementation principle of the rapid building cost estimation method in the embodiment of the application is as follows: when the construction project needs to estimate the construction cost, all project characteristics of the construction project are preferentially generated, and the project characteristics correspond to the project characteristics in the construction cost result library. And then, the cost engineer matches the known cost data which can ensure the estimation accuracy into the corresponding project characteristics according to own experience. And if the cost engineer does not match the cost data of all the project characteristics, searching similar projects similar to the building project from the building cost result library, matching the corresponding cost data in the similar projects to the corresponding project characteristics in the building project, and finishing the estimation.
The embodiment of the application also discloses a rapid building cost estimation system. Referring to fig. 4, the rapid building cost estimation system includes a building cost result database module 1 for storing project data of known approved projects;
the acquisition module 2 is used for acquiring the project characteristics of the project to be cost-estimated; and is also used for obtaining the cost data of the project characteristics known by the cost engineer;
the processing module 3 is used for obtaining project characteristics with unknown cost data; the system is also used for retrieving the cost data of project characteristics similar to the project characteristics of which the cost data is unknown from the building cost achievement database module 1 and endowing the retrieved cost data with corresponding project characteristics in the project to be cost-estimated;
and the output module 4 is used for outputting the estimation result.
The building cost achievement database module 1 can be a mySQL database or an HBase database, is used for storing data and can read, add, delete and modify the data in the database. The acquisition module 2 may be an input device of the computer, or may be another device capable of importing data into the computer. The processing module can be a software or a program in an MCU, a singlechip system or a calculator with processing capability, or can be one or more of the software and the program in the MCU, the singlechip system and the calculator.
The implementation principle of the rapid building cost estimation system in the embodiment of the application is as follows: the cost engineer inputs cost data of project features with high estimation accuracy, retrieves the cost data of similar project matching loss through the processing module 3, and finally outputs an estimation result, namely, the estimated price.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A rapid building cost estimation method is characterized in that: comprises the following steps of;
constructing a building cost result library;
inputting project characteristics of a project to be manufactured;
inputting cost data known by a cost maker in the project characteristics;
obtaining the project characteristics with unknown cost data;
searching the construction cost result library for construction cost data of project characteristics similar to the project characteristics of which the construction cost data are unknown, and endowing the searched construction cost data with corresponding project characteristics;
and outputting an estimation result.
2. The rapid building cost estimation method according to claim 1, wherein: the step of constructing a building cost result library comprises the following steps:
constructing a plurality of achievement province level databases by taking provinces as classification standards;
constructing a plurality of corresponding achievement city level databases in the achievement province level database by taking a city as a classification standard;
and summarizing project characteristics of known projects which are subjected to acceptance inspection and cost data corresponding to the project characteristics in a corresponding achievement market database.
3. The rapid building cost estimation method according to claim 2, wherein: the project characteristics at least include building time, building floor number, floor space, building structure, house type structure and total cost of human materials and machines.
4. The rapid building cost estimation method according to claim 3, wherein: the steps of retrieving cost data of project features similar to the project features for which cost data is unknown from the building cost result library, and assigning the retrieved cost data to corresponding project features include:
searching the achievement market level database corresponding to the province and the city of the project to be cost estimated from the achievement database;
retrieving said known accepted projects similar to said project to be assessed for cost from said corresponding achievement market level database;
and endowing the cost data of the corresponding project characteristics in the known project which is subjected to acceptance inspection to the project characteristics of which the cost data is unknown in the project to be evaluated.
5. The rapid building cost estimation method according to claim 4, wherein: the step of determining said known approved item similar to said item to be cost estimated comprises:
at least the building time, the building number of layers and the building structure in the project characteristics of the known acceptance inspection completion project are the same as the corresponding project characteristics of the project to be cost estimated; if a plurality of known items which are checked and accepted are judged to be similar items, selecting the known items which are checked and accepted and have the same item characteristics as the items to be estimated for the cost and the largest quantity as the similar items;
otherwise, selecting the known items which are the same as the corresponding item characteristics of the items to be estimated in the construction layer number and the construction structure in the item characteristics and are closest to the construction time of the items to be estimated as similar items;
otherwise, retrieving the known accepted projects similar to the project to be estimated in the building cost result library.
6. The rapid building cost estimation method according to claim 5, wherein: said step of retrieving said known approved projects in said building cost performance repository similar to said project to be cost estimated comprises:
constructing a city classification database, storing city names of all cities in the country and the latest one-year GDP values corresponding to the city names;
each city name is independently divided into a group, and the city names with GDP values not more than ten percent of the GDP values of the city names are added into the group;
preferentially searching similar projects in a corresponding result city level database of a city in the same group as the city to which the project to be cost estimated belongs; otherwise, similar items are searched in other achievement market level databases.
7. The rapid building cost estimation method according to claim 6, wherein: the system also comprises a cost engineer contact information database which stores contact information of a plurality of cost engineers;
when no similar project exists in the construction cost result library, acquiring the contact way in the construction cost engineer contact way database, and sending all project characteristics of the project to be estimated to the construction cost operators;
and acquiring cost data transmitted by a cost engineer, averaging the cost data corresponding to each project characteristic, and endowing the corresponding average value to the corresponding project characteristic.
8. The rapid building cost estimation method according to claim 7, wherein: and after all project characteristics of the project to be estimated are sent to each construction engineer, if construction cost data are not obtained, information is sent to the construction engineer once in a period of time.
9. The rapid building cost estimation method according to claim 1, wherein: the estimation result at least comprises the estimation price of the item to be cost-estimated and the item name of the item to which the item characteristics similar to the item characteristics in the item to be cost-estimated belong.
10. A rapid building cost estimation system, characterized by: the method comprises the following steps:
the building cost achievement database module (1) is used for storing known project data of projects which are checked and accepted;
the acquisition module (2) is used for acquiring the project characteristics of the project to be cost-estimated; and is also used for obtaining the cost data of the project characteristics known by the cost engineer;
the processing module (3) is used for obtaining project characteristics with unknown cost data; the system is also used for retrieving the cost data of project characteristics similar to the project characteristics of which the cost data is unknown from the building cost achievement database module (1) and endowing the retrieved cost data with corresponding project characteristics;
and the output module (4) is used for outputting the estimation result.
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Application publication date: 20210416 |