JP2002230080A - System for automatically estimating price of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automation system capable of accurately and quickly performing the estimation of the price of a building which fulfills the desires of a customer as much as possible. SOLUTION: At the time of estimating a building, the roof specification, outer wall specification, story height, outer wall area, inner wall area, floor area, and the number of windows or the like are preliminarily inputted to a computer. Then, an estimate is prepared by using the unit prices of components corresponding to all the specifications, data indicating which specification is made to correspond to each component, and data for calculation including the calculation formula of the estimated sum of each component. Therefore, it is possible to make common the contents of the arithmetic processing by making common the input picture of the basic quantity or the arithmetic processing of the integrated quantity to buildings with various specifications. Also, it is possible to quickly and easily operate the calculation, and to reduce an error between the estimated sum and the real price.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for automatically estimating a building.

[0002]

2. Description of the Related Art When a building is sold, it is necessary to determine appropriate specifications while estimating a building cost according to a customer's request. The price of the building is higher than that of general products, and the price difference is remarkable due to the difference in specifications.
Therefore, rough estimates are often made when the specifications are not yet determined. For example, several types of models are set, and a unit price per square meter is determined for each model. Ask the customer what model they want, how much floor space they want, and get an estimate from the product of the area and unit price, or outline the unit price and quantity for each material in the main part of the building. There is a way to sum them up.

[0003]

However, the above-mentioned prior art has the following problems to be solved. Since the price of the building is expensive, the error between the estimated price and the actual price increases, and the budget often exceeds the budget planned by the customer. On the other hand, on the building seller side, if the actual building cost greatly exceeds the estimated amount presented to the customer, the cost cannot be sufficiently reflected in the sales amount, and the profit may have to be reduced. However, making these estimates accurately requires experience and skill, and in addition, the estimation process requires a lot of effort. In addition, there is a problem in that the work of finding the unit price and quantity for each material in the main part of the building is troublesome, the estimation takes a long time, and the customer waits. Therefore, it is desired to develop an automation system capable of estimating a building price that satisfies the needs of customers as accurately and quickly as possible.

[0004]

The present invention employs the following structure to solve the above problems. <Structure 1> Specification selection means for selecting basic specifications of a building, quantity specification means for specifying a basic quantity of an integration item required for integrating an estimated amount of a building, and specification values based on the above specifications An integrated quantity calculating means for calculating the integrated quantity of the main integrated items using the basic quantity of the integrated item, and calculating the estimated amount for each part based on the unit price of the parts determined according to the above specifications and the basic quantity and the integrated quantity. A building price calculation means for calculating a building price based on a result of calculating and summing up the estimated amounts for each part; and an output means for outputting a quote in a predetermined format including the calculated building price. An automatic price estimation system for buildings.

<Configuration 2> In the system for automatically estimating the price of a building described in Configuration 1, the basic specifications of the building include basic information on the number of floors and the height of the building, and the selection of the roof material and the outer wall material. An automatic estimation system for a building, comprising: an exterior specification, an interior specification for selecting an interior material of a building, and an equipment specification for selecting main equipment.

<Configuration 3> In the system for automatically estimating the price of a building according to Configuration 1, the specification selecting means selects basic specifications of the building according to the quality level of the building. Estimation system.

<Configuration 4> In the system for automatically estimating the price of a building described in Configuration 1, the items required for integrating the estimated amount of the building include wall length, roof slope, floor area, and opening area. An automatic building quotation system comprising a number.

<Configuration 5> In the system for automatically estimating the price of a building described in Configuration 4, the integration items necessary for integrating the estimated amount of the building include the actual outer wall area excluding the opening area and the actual inner wall area. Automatic building estimation system characterized by including area.

<Structure 6> In the system for automatically estimating the price of a building according to Structure 1, the data for calculating the estimated price for each part includes unit prices of parts corresponding to all specifications. Automatic building estimation system.

<Structure 7> In the system for automatically estimating the price of a building according to Structure 6, data for calculating the estimated price for each part includes unit prices of parts corresponding to all specifications and the specification of each part. An automatic quotation system for a building, characterized by including data indicating whether or not the quotation is supported and a formula for calculating an estimated amount for each part.

<Structure 8> In the system for automatically estimating the price of a building described in Structure 1, a unit price table for displaying a unit price of parts determined according to the above specifications is separately provided for each planned construction site of the building. An automatic estimating system for buildings.

<Configuration 9> The automatic price estimation system for a building according to Configuration 1, wherein only a part determined in accordance with the above specifications is selected and a quote is output and displayed. .

<Structure 10> Specification selection processing for selecting basic specifications of a building, quantity specification processing for specifying a basic quantity of an integration item necessary for integrating an estimated amount of a building,
An integrated quantity calculation process that calculates the integrated quantity of the main integrated items using the specification value based on the above specifications and the basic quantity of the integrated item, and based on the unit price of the parts determined according to the above specifications, the basic quantity, and the integrated quantity A building price calculation process for calculating a building price based on the result of calculating the estimated amount for each part and summing up the estimated amount for each part, and a quote in a predetermined format including the calculated building price And a computer program for executing on a computer an output process for outputting.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. In the present invention, basic specifications for determining the material of the roof and walls of the building, etc., and the main quantities of the building, such as the length of the outer wall of the building and the number of windows, are input to the computer, and are automatically input by the computer. Let the building estimate the price. Within this specification, a specific estimate is calculated for each part. Therefore, a relatively detailed and accurate price estimate can be made. This estimation result may be used as an approximate estimate or as a somewhat accurate estimate.

FIG. 1 is a block diagram showing a concrete example of a system for automatically estimating the price of a building according to the present invention. This system is realized by, for example, a computer program executed by a personal computer or a workstation. The computer shown in the figure includes a display 1, a main body control unit 2, a keyboard 3, and a mouse and other components (not shown). A printer 4 and a storage device 5 are connected to this computer. The storage device 5 may be housed inside a personal computer or may be externally attached. In addition, functional blocks of a computer program executed on a personal computer are shown in a frame indicated by a dashed line in FIG. That is, the program executed by this computer is the specification selecting means 1
1, a quantity designating means 12, an integrated quantity calculating means 13, a building price calculating means 14, an estimate output means 15, and the like.

This program is executed by a processor (not shown) provided inside the main body control unit 2. In the present invention, when an estimate of a building is requested,
First, information about the basic specifications of the building is input to a computer. Further, as described later, a predetermined basic quantity required for integrating the estimated price of the building is input. The keyboard 3, a mouse (not shown) and other man-machine interfaces are used for inputting such information. When necessary information is input to a computer and arithmetic processing is performed, a building price is calculated, and finally a quote is output. The quote is displayed on the display 1 or printed out by the printer 4. The storage unit 5 stores component unit price data 16 of the building for calculating the building price. Hereinafter, specific processing contents of each means shown in FIG. 1 will be described.

FIG. 2A is an explanatory view of the specification selecting means 11, FIG. 2B is an explanatory view of the quantity specifying means 12, and FIG. 2C is an explanatory view of the integrated quantity calculating means 13. Specification selection means 11
Is a program for selecting basic specifications of a building and inputting the results to a computer. For example, FIG.
The screen 21 as shown in FIG.
To be displayed. Here, for example, basic information such as the number of floors and floor heights, basic specification names including roof and outer wall specifications (exterior specifications), and selection candidates for specification selection are displayed. Select the number of floors, such as two stories or three stories. The floor height is selected to be 3.1 or 2.7. If it's a roof, choose between slate and Japanese tile. If it's an exterior wall, you can choose between mortar spraying and siding. In addition, it is preferable to display interior specifications for selecting interior materials such as wallpaper and floor materials, and equipment specifications for selecting main facilities such as a bath unit and a system kitchen. This is because it is a factor that greatly affects the price of a house.

The selection operation is performed using a mouse or the like. Screen 2
Clicking a selection candidate while displaying 1 displays screen 22
The selection result of the specification value is displayed as shown. By selecting this specification, it is possible to estimate for each specification.

The quantity designating means 12 displays a screen 23 as shown in FIG. 2 (b), and requests to input a basic quantity of an integration item necessary for integrating the estimated amount of the building. That is, the portion of the basic quantity shown in FIG. 2B is blank in the initial state. Here, the numerical value of the result obtained with reference to the design drawing of the building to be estimated is input. As shown in the figure, the integration items are items such as 1F outer wall length, 1F inner wall length, 1F floor area, sweep window, and lumbar window. If there is a second floor, similar items are provided for the second floor. For example, the basic quantity of the outer wall length is input by measuring the length of the outer wall of the design drawing as it is on the drawing. Windows are a very important factor in calculating the estimated cost of a building. The base quantity of a window is the number of windows.

When the specifications are determined and the basic quantity is input, the integrated quantity for the estimation calculation is calculated. The integrated quantity calculation means 13 is a spreadsheet program for taking in the contents of the images 22 and 23 using the operation formula 24 shown in FIG. Here, the contents of the arithmetic expressions for calculating the outer wall area, the interior area, the actual outer wall area, the actual inner wall area, the roof area, and the like are shown. The outer wall area is obtained by (1F outer wall length × floor height). Interior area is 1F inner wall length x floor height x 2+
Actual outer wall area. The actual outer wall area is an area excluding openings such as a sweep window and a lumbar window. The same applies to the actual inner wall area, but the interior fitting area is further deducted. The inner fitting corresponds to the opening in the inner wall. This calculation is necessary to determine the actual area of the member to be attached to the outer wall or the inner wall.
The roof area is determined by (building area + eaves area) x roof slope coefficient.

FIG. 3A is a view for explaining a specific example of the integrated quantity including the result of performing the above-described operation and the basic quantity.
(B) is an explanatory view of a specific example of the calculation method. The screen 25 of (a) shows the specific contents of the integrated quantity for the integrated item. As shown in the figure, the integration items include the roof area, the 1F outer wall length, the 1F inner wall length, the 1F floor area, the number of windows, the outer wall area, and the like. Specification values based on the above specifications (Fig. 2
(A)) and the total quantity calculated using the basic quantity of the total item (FIG. 2 (b)) are listed. The integrated quantity calculating means 13 shown in FIG. 1 is a program for performing an arithmetic processing for obtaining such an integrated quantity.

If the arithmetic expression shown in FIG. 2C is executed and the basic quantities shown in FIG. 2B are rearranged and transcribed, the result shown in FIG. 3 is obtained. The operation of selecting specifications using the screens 21 and 23 is very simple. FIG.
The process of inputting the basic quantity using the screen 23 shown in (b) can be easily and quickly performed while looking at the design drawing.
It is a feature of the present invention that accurate estimation calculation is automatically performed thereafter by such a simple operation. The reason why the integrated quantity as shown in FIG. 3 is obtained is that it is the most basic quantity for integrating the estimated amount of the building. For example, if the roof area can be calculated, the price of the roof can be calculated almost exactly by knowing the unit price of the roof material. For items that greatly affect the price of the building, the basic quantity is calculated as accurately as possible based on the blueprint, and the integrated quantity is calculated automatically. A fairly accurate estimate is possible.

The relationship between the outer wall area and the interior area will be briefly described with reference to FIG. As shown, it is assumed that there is an outer wall 28 and an inner wall 29 is located therein. The outer wall length is (a + b) × 2. On the other hand, the interior such as wallpaper is installed on both the inside of the outer wall and both sides of the inner wall. The inside length of the outer wall is
(a + b) × 2. The length of both sides of the inner wall is (c + d) ×
2. Therefore, the total length is (c + d) × 2 + (a + b)
× 2. Multiply this by the floor height to get the area of the interior. The area of the interior is different from the outer wall, and it is accurate to multiply the ceiling height. However, for wallpaper, etc., excess loss occurs in the vertical and width directions, so multiply the floor height to obtain a more accurate estimate. To do.

FIG. 4 is an explanatory diagram showing a specific example of an estimated amount calculation table for calculating a building price. The building price calculation means 14 is, as shown in FIG. 4, a spreadsheet program showing a relationship among parts, unit price, specifications, integrated quantity, and estimated price. On the left side of this screen 26, a list of component names used for each part of the building is displayed. The data for calculating the estimated price for each part in this table format includes the unit price of the part corresponding to all specifications, data indicating which specification each part corresponds to, and the formula for calculating the estimated amount for each part. It is included. When the specification and basic quantity of the building are determined as shown in FIGS. 2A and 2B, one of these parts is selected. In the above example, the roof is a slate. The estimated quantity or the base quantity is applied to this, and the estimated amount is calculated. The estimated roof price of 184,800 yen is calculated by multiplying the unit price of the slate tile by 3000 yen and the roof area (61.6 square meters). The same applies to other parts, and the estimated amount of only the corresponding parts is calculated.

It is necessary to include not only the material price but also the labor cost in the estimation of the building price. If there is a system for separately obtaining and adding a wage for each work such as foundation work, woodwork, exterior wall work, and electric work, the unit price of parts on this screen 26 may be displayed as it is. When it is desired to calculate the estimated amount including the labor cost by this arithmetic processing, the labor cost may be included in the component unit price. If the estimated price can be automatically calculated based on the unit price, the basic quantity, and the accumulated quantity of the parts as described above, the total estimated price can be calculated immediately by summing up the estimated prices for each part.

The estimate output means 15 outputs only the result obtained by removing the parts not to be estimated from the screen 26 of FIG. Therefore, for example, when the specification of the building is determined, a procedure may be executed in which a list of only necessary parts on the screen 26 is selected, the estimated amount is calculated, and the total is calculated. Also, the unit price of parts often differs depending on the area where the building is constructed. Therefore, it is preferable to provide a unit price table for displaying the unit price of parts separately for each planned construction site of a building.

FIG. 5 is a flowchart showing a specific operation of the above system. First, step S1
In the specification, the specification of the building is designated by using the specification selecting means 11 as described with reference to FIG. Next, the quantity specifying means 12 shown in FIG. 1 accepts the input of the basic quantity in the manner described with reference to FIG. This completes the preparation for the automatic estimation calculation. Next, in step S3, the integrated quantity calculating means 13 performs an arithmetic process in the manner shown in FIG. 2C, and outputs the integrated quantity as shown in FIG. 3 (step S4). The content of the integrated quantity may be displayed on a display or may simply be stored in a storage device. In step S5, a part unit price table as shown in FIG. 4 is referred to. This may refer to another one for each site where the building is to be constructed, as described above.

In step S6, an estimate is calculated for each part. In this case, the corresponding part is automatically selected according to the specification, and the estimated amount is calculated. In step S7, the calculated estimated amounts are summed to obtain a total estimated amount. Building price calculation means 14 (FIG. 1)
Executes the above processing.

FIG. 6 is an operation flowchart showing the specific contents of the calculation of the total estimated amount and the output processing of the estimate shown in FIG. First, in step S11, the specification selected by the specification selecting means 11 is referred to, and in step S12
Refers to the integrated quantity or basic quantity of parts.
In step S13, a part set in advance for each specification is selected. Next, in step S14, referring to the unit price of the corresponding part from the estimated amount calculation table shown in FIG. 4, the estimated amount is calculated in step S15. In step S16, it is determined whether the calculation of the estimated amount has been completed for all the necessary parts. If not completed, the processing from step S11 to step S15 is repeated. When the calculation of the estimated amount for all the necessary components is completed, the process proceeds to step S17, and the total estimated amount is calculated. When the calculation of the estimated amount and the calculation of the total estimated amount for the component selected in accordance with the specification are completed, an estimate including the results is output (step S18).

By selecting the building components, it is possible to improve the strength against earthquake or wind force, the strength against fire, the durability against deterioration, and the like. When a building that satisfies the minimum standards of the Building Standards Act and the law that evaluates the quality of houses is set to grade 1, the higher levels are set to grade 2 or 3 in order. The specification selection means may select this class, that is, the quality level of the building, and execute the automatic estimation. If the grade is selected, the basic specifications of the building are automatically determined, so that the processing described above can be performed. This can be realized, for example, by preparing table data in which classes are associated with basic specifications of buildings.

In the above embodiment, the roof specification, the outer wall specification, the floor height, the outer wall area, the inner wall area, the floor area,
The input of the number of windows and the number of windows to the computer has been described. However, these data can be automatically extracted from the design data when the floor plan is designed. Therefore, for example, it is possible to automatically perform the estimation calculation of the building price at the same time as the work of determining the floor plan and the specification according to the customer's request.

By performing the above estimation calculation processing,
Since the input screen of the basic quantity and the calculation processing of the integrated quantity are common to buildings of various specifications, the contents of the calculation processing can be shared. Also, the calculation of the component unit price table and the estimated price thereof as shown in FIG. 4 can be executed in a uniform manner in accordance with a substantially constant rule. If a quotation is created by selecting parts according to the specification, a quotation according to the specification can be easily created. Also, there is no need to prepare a form as an estimate for each specification. Thus, the program can be easily operated and maintained. In addition, since the estimation calculation is performed in units of parts, it is specific, and it is possible to quickly execute a rough estimation that is extremely close to an accurate estimated amount. Therefore, an error between the estimated price and the actual price can be minimized.

The functional blocks of the programs shown in the above-mentioned figures may be constituted by separate program modules or may be constituted by integrated program modules. Further, all or a part of these functional blocks may be configured by hardware using a logic circuit. Further, each program module may be operated by being incorporated into an existing application program, or may be operated as an independent program.
The computer program for realizing the present invention as described above can be recorded on a computer-readable recording medium such as a CD-ROM, installed, and used. It can also be downloaded and used in the memory of a computer via a network.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a specific example of a system for automatically estimating the price of a building according to the present invention.

FIG. 2A is an explanatory diagram of a specification selecting unit 11, and FIG.
Is an explanatory view of the quantity specifying means 12, and FIG.

3A is a diagram illustrating a specific example of an integrated quantity including a result of performing the above-described calculation and a basic quantity, and FIG. 3B is a diagram illustrating a specific example of a calculation method.

FIG. 4 is an explanatory diagram showing a specific example of an estimated amount calculation table for calculating a building price.

FIG. 5 is a flowchart showing a specific operation of the above system.

FIG. 6 is an operation flowchart showing specific contents of calculation of a total estimated amount and output processing of an estimate shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display 2 Main body control part 3 Keyboard 4 Printer 5 Storage device 11 Specification selection means 12 Quantity designation means 13 Cumulative quantity calculation means 14 Building price calculation means 15 Estimate output means 16 Component unit price data

Claims (10)

[Claims] 1. A specification selecting means for selecting basic specifications of a building, a quantity specifying means for specifying a basic quantity of an integration item required for integrating an estimated amount of a building, and a specification value based on the specification. An integrated quantity calculating means for calculating the integrated quantity of the main integrated item using the basic quantity of the integrated item; and an estimated price for each part based on the unit price of the part determined according to the specification and the basic quantity and the integrated quantity. And calculate
A building price calculating means for calculating a building price based on a result of summing up the estimated amounts for each part; and an output means for outputting a quote in a predetermined format including the calculated building price. An automatic price estimation system for the featured buildings. 2. The system for automatically estimating a price of a building according to claim 1, wherein the basic specifications of the building include basic information on the number of floors and the height of the building, and a material for selecting a roof material and an outer wall material. Exterior specification,
An automatic building estimation system comprising an interior specification for selecting an interior material of a building and an equipment specification for selecting main equipment. 3. An automatic price estimation system for a building according to claim 1, wherein the specification selecting means selects a basic specification of the building according to a quality level of the building. system. 4. The automatic price estimation system for a building according to claim 1, wherein the integration items required for integrating the estimated amount of the building include a wall length, a roof slope, a floor area, and the number of openings. An automatic estimating system for a building, comprising: 5. The automatic price estimation system for a building according to claim 4, wherein the integration items necessary for integrating the estimated amount of the building include an actual outer wall area and an actual inner wall area excluding an opening area. An automatic estimating system for a building, comprising: 6. A building price estimation system according to claim 1, wherein the data for calculating the estimated price for each part includes unit prices of parts corresponding to all specifications. Automatic quotation system. 7. The system for automatically estimating a price of a building according to claim 6, wherein the data for calculating the estimated price for each part includes unit prices of parts corresponding to all specifications, and the specification of each part. An automatic system for estimating a building, which includes data indicating whether or not to correspond, and a formula for calculating an estimated amount for each part. 8. The system for automatically estimating the price of a building according to claim 1, wherein a unit price table for displaying a unit price of parts determined according to the specification is separately provided for each planned construction site of the building. An automatic estimation system for the featured building. 9. The automatic quotation system for a building according to claim 1, wherein the quotation sheet is displayed by selecting and displaying only parts determined according to the specifications. 10. A specification selecting process for selecting basic specifications of a building, a quantity specifying process for specifying a basic quantity of an integration item required for integrating an estimated amount of a building, and a specification value based on the specification. An integrated quantity calculation process of calculating the integrated quantity of the main integrated item using the basic quantity of the integrated item; and an estimated price for each part based on the unit price of the part determined according to the specification, the basic quantity and the integrated quantity. And calculate
A building price calculation process for calculating a building price based on a result of summing up the estimated amounts for each part and an output process for outputting a quote in a predetermined format including the calculated building price are executed on a computer. Program to do.