JPH0991337A - Construction cost estimation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily modify an estimate on the basis of altered information even when a design, the unit price of a member, and the construction cost are changed. SOLUTION: A hard disk 2a on which design information designed by CAD is stored, a hard disk 2b on which member unit price information is stored, and a hard disk 2c on which construction cost information is stored are connected to a computer 3 to which a CRT 4 and a printer 5c are connected; and the computer 3 estimates the construction cost according to the design information, member unit price information, and construction cost information, and the estimated construction cost is displayed on the CRT 4 and printed on the printer 5.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a construction cost estimate system for calculating a construction cost estimate from design information, member unit price information and construction cost information.

[0003]

[Prior art]

[0004] Conventionally, the estimation of the construction cost for housing construction, landscaping construction, etc. has been performed as follows.

First, an estimater reads the type and size of the member to be used from the design drawing, calculates the cost of the member to be used from the unit price table of the member for each member,
These are added up to calculate the total cost of materials.

Next, the construction cost is calculated from the above drawings, and the construction cost is added to the construction cost to collect the construction cost.

Further, as a device for calculating the size of the above member, there is one called a digitizer. In this digitizer, the contour of a member drawn on a design drawing is regarded as a coordinate position, and this is read by a reading device called a dedicated pointing device to calculate the area of the member.

[0008]

[Problems to be Solved by the Invention]

However, for example, since the number of parts used in a house is several thousand, the above estimation work is very complicated, and in addition, there are design changes, unit price changes of members, and construction cost changes. In this case, there was a problem that the estimation work had to be performed again each time these changes were made.

Further, when the digitizer is used, the time required for the area calculation can be shortened as compared with the area calculation in which the person in charge of the estimation directly reads the drawing. Accurate area calculation may not be possible due to elongation of the design drawing.Furthermore, even if there are no problems with the design drawing, it is easy to make an error in inputting the contours of the member at multiple points with the pointing device, which results in accurate There was a case where it was not possible to calculate.

In the above estimation work, the estimation work is performed by adding the profit to the unit price of the member, the actual cost of construction, etc. based on the experience of the person in charge of estimation, but the yield of the used member is reduced,
It is difficult for even a skilled estimator to change the estimate while securing the desired profit in response to changes in the construction cost since the start of construction, such as an increase in construction cost due to deterioration of weather conditions. However, since the estimation work was performed unclearly based on the empirical rule, there was a problem that the accurate profit ratio was not known and the business analysis could not be performed.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to easily calculate an accurate construction cost estimate from design information, member unit price information, and construction cost information.

[0013]

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, a design information storage means for storing design information designed by CAD, a member unit price information storage means, and a construction cost information storage means are displayed as images. Connected to the calculation means to which the means and the printing means are connected, calculate the construction cost estimate from the design information, material unit price information and construction cost information by the calculation means, and display the construction cost estimate on the image display means, The printing is performed by the printing means.

[0015]

[Action]

In the construction cost estimation system having the above-mentioned configuration, the design information storage means contains the design information designed by CAD, the member unit price information storage means contains the information of the member unit price, and the construction cost information storage means contains the construction cost. Information is stored.

The design information and the unit price information of each member are input to the calculating means, and the calculating means calculates the cost of each member, and also calculates the total member cost obtained by adding all the members.

In addition, by inputting construction cost information into the design information,
A construction cost is calculated from the construction cost information and the design information. Further, the construction cost is calculated by adding the construction cost and the total member cost, and the construction cost is displayed on the image display means and printed by the printing means.

[0019]

DETAILED DESCRIPTION OF THE INVENTION

The construction cost estimation system according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the construction of a construction cost estimation system. This system, a hard disk 2a that stores design information designed by CAD, a hard disk 2b that stores price information such as the unit price and material price required for housing construction, and construction cost information such as personnel costs and construction days A hard disk 2c storing the
Connected to Further, the computer 3 has a CRT.
4 and the printer 5 are connected.

In order to make an estimate with the construction cost estimate system having the above-mentioned structure, the computer 3 is operated to display the design information designed by CAD on the screen of the CRT 4, and the house is classified by parts or materials from this design information. To divide. This design information includes design drawings for the entire house, design drawings for each part and material, and shape dimension data such as length, width, and thickness calculated by the design.
Characteristic data such as allowable load for each part and material is also included.

Next, the computer 3 calculates the necessary parts and material prices by arithmetically processing the shape and size data of the parts and materials and the unit price and material price read from the hard disk 2b. Do this work for all parts or materials that make up the house,
These are added up to calculate the total cost of materials.

The computer 3 calculates the construction cost from the construction cost information read from the hard disk 2c and the design information, and further adds the profit after adding the total member cost to the construction cost to perform the construction. Calculate the estimated amount.

Next, a case will be described in which the estimated work amount is already calculated using this system, and then the estimate is made again due to a design change or the like.

When there is a design change, the computer 3
Rewrites the design information already stored in the hard disk 2a, and based on the rewritten information, again performs the same arithmetic processing as above to calculate the component and material prices. For the subsequent processing, the same procedure as that after the above-mentioned integrated calculation of the total member materials is performed.

In this system, when environmental conditions such as the construction site are input, appropriate parts and materials within the allowable range are selected based on the characteristic data of the hard disk 2a, and the selected parts and materials are used. It is also configured so that the estimated amount is calculated by

According to the present system, even after the estimation of the number of parts and the number of materials has already been calculated, the design information and the price can be changed by simply changing the design by CAD. Since the information is linked to
The computer 3 automatically changes the estimated amount.

[0029]

【The invention's effect】

As is clear from the above description, in the construction cost estimation system according to the present invention, the CAD design information stored in the design information storage means and the member stored in the member unit price information storage means. The cost of the material is calculated from the unit price information, and the construction cost is calculated from the design information and the construction cost information stored in the construction cost information storage means, and the construction cost is added to the cost of the material described above. Can be quoted.

As described above, the person in charge of estimating the CAD
Since the design information designed in 1 above can be directly used as the information for calculating the estimate, the construction cost can be estimated accurately and easily.

Further, even when the design is changed, the unit price of the member is changed, and the construction cost is changed, the estimate can be easily changed based on the changed information.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a construction cost estimation system according to the present invention.

[Explanation of symbols]

2a, 2b, 2c ... hard disk, 3 ... computer, 4 ... CRT, 5 ... printer

Claims (1)

[Claims] 1. A calculation means in which a design information storage means for storing design information designed by CAD, a member unit price information storage means, a construction cost information storage means, an image display means and a printing means are connected. Connect to, design information with the above calculation means,
A construction cost estimation system characterized in that a construction cost estimate is calculated from material unit price information and construction cost information, and the construction cost estimate is displayed on an image display means and printed by the printing means.