WO2019009538A1 - Method for calculating material quantity for uncreated 3d modeling object - Google Patents

Abstract

The present invention relates to a method for calculating a material quantity for an uncreated 3D modeling object and, more particularly, to a method for calculating a material quantity for an uncreated 3D modeling object, by which a material quantity of an uncreated object can be automatically calculated using 3D modeling data created using building information modeling (BIM), with respect to an object, such as a 50mm or smaller finishing material that is not modeled in 3D, among BIM data creation elements for 3D architecture design.

Description

How to calculate quantity for 3D modeling unfinished objects

The present invention relates to a method for calculating a quantity of a 3D modeling unimplemented object, and more particularly, to a method for calculating a quantity of BIM (3D modeling unobtained object), for a BIM (Builing Information Modeling) The present invention relates to a method for calculating a quantity of a 3D modeling unobtained object that can automatically calculate the quantity of an uncompleted object by utilizing 3D modeling data created using the 3D modeling data.

In 3D design for building design, the design engineer does not create objects such as finishing materials with thickness less than 50 mm among the BIM data creation elements, and calculates the amount of finishing materials by replacing with material finishing table.

 The main reason that the amount of finishing material is not reflected in the 3D modeling is that the number of objects to be created increases twice in order to create a 3D model for the second unimplemented object without affecting the design result in the first design stage The number of persons to be filled in, the creation time, and so on. Thirdly, it is practically impossible to immediately respond to changes occurring during designing.

 Therefore, the Public Procurement Service (PPS), which is a public construction organization that manages national standards, is required to make 3D modeling only for finishing materials of 50 mm or more in the basic design, intermediate design and execution design in the "Basic Guidelines for Application of Facility Project BIM".

 In order to perform 4D & 5D, which means process management and quantity calculation using the BIM data created in this manner, calculation of the quantity of objects that are not created may be a considerable problem. As a method for solving this problem, there is a problem that the created object can be calculated by using the information of the object, but it can not be calculated by the existing method (manual calculation) which is not related to the 3D object .

The problem is that it is difficult to simulate regular schedule and cost, and there is still possibility of error due to human work due to mixed use of existing calculation method. In addition, it is impossible to immediately respond to changes of various drawings generated during designing and construction, and it takes much time to change the drawings, and the utilization of BIM data is remarkably decreased, and in particular, 4D & 5D operation on construction management becomes difficult .

The BIM refers to an open BIM, and the open BIM refers to a BIM that uses an international standard (IFC) file to share data regardless of the type of software used.

In order to solve the above problems, the present invention aims at providing a method of calculating the quantity of BIM data by using BIM data for objects such as finishing materials, which are objects that are not created in 3D modeling.

According to an aspect of the present invention, there is provided a method of designing a 3D modeling system, the method comprising: (a) uploading and storing BIM attribute building information data converted from 3D modeling data; (b) searching a floor object from the BIM attribute building information data; (c) defining the searched floor object as a main reference object and listing each of the main reference objects; (d) searching for a peripheral member that is in contact or collision with the listed primary reference object, searching for a wall and column object in contact with the edge of the primary reference object in the searched peripheral member, Defining a sub-reference object, and cataloging each of the sub-reference objects; (e) defining a length in which the main reference object and the first sub-reference object are in contact with each other as a connection length (L), and calculating the connection length (L); (f) defining and cataloging a ceiling, which is a top surface of the main reference object, as a second sub-reference object; (g) defining a distance between the main reference object and the second sub-reference object as a ceiling height (H), and calculating the ceiling height (H) defined above; And (h) defining an unfinished object description by the 3D modeling on the main reference object and the first and second sub-reference objects, using the listed data and the digitized data as variables, And calculating an amount of a non-created object by assigning an arithmetic expression to the object model.

(I) examining the attributes of the first sub-reference object to search for a door or window above the joint length area, and defining the third sub-reference object as the door or the window, And cataloging and storing each of the plurality of information.

(J) extracting numerical data on a size from the attribute data of the listed third sub-reference object and using the extracted numerical data as a variable, the non-3D modeling object And calculating an amount of an uncompleted object by assigning an arithmetic expression for each of the uncompleted object details.

The present invention is further characterized in that, in the step (b), the attribute of the bottom object is examined to confirm whether or not the finish material is created.

The present invention is advantageous in that it is possible to obtain objectively accurate data of construction costs and cost because the amount of material can be automatically calculated for objects such as finish materials that are not created when creating 3D modeling using BIM.

Further, even when the present invention is not created by 3D modeling, since the quantity of unfinished objects such as finishing materials can be calculated, it is possible to perform systematic process management on unfinished objects.

In addition, since the present invention can perform the process management together even though it is not created by 3D modeling, it is advantageous that the construction management of 4D and 5D is possible.

Further, in the present invention, when the 3D modeling is changed, the quantity calculation for the uncompleted object is automatically changed according to the changed details, so that the construction period is shortened and the construction cost is reduced.

FIG. 1 is a flow chart of a method of project management management using BIM.

FIG. 2 is a flowchart illustrating a method for calculating a quantity of a 3D modeling unfinished object according to the present invention. FIG.

Figure 3 illustrates extracting a primary reference object and a first sub-reference object and a fourth sub-reference object according to the present invention.

FIG. 4 is a tree diagram of a main reference object and a sub-reference object according to the present invention; FIG.

The best mode for carrying out the present invention comprises the steps of: (a) uploading and storing BIM attribute building information data converted from 3D modeling data; (b) searching a floor object from the BIM attribute building information data; (c) defining the searched floor object as a main reference object and listing each of the main reference objects; (d) searching for a peripheral member that is in contact or collision with the listed primary reference object, searching for a wall and column object in contact with the edge of the primary reference object in the searched peripheral member, Defining a sub-reference object, and cataloging each of the sub-reference objects; (e) defining a length in which the main reference object and the first sub-reference object are in contact with each other as a connection length (L), and calculating the connection length (L); (f) defining and cataloging a ceiling, which is a top surface of the main reference object, as a second sub-reference object; (g) defining a distance between the main reference object and the second sub-reference object as a ceiling height (H), and calculating the ceiling height (H) defined above; And (h) defining an unfinished object description by the 3D modeling on the main reference object and the first and second sub-reference objects, using the listed data and the digitized data as variables, And calculating an amount of a non-created object by assigning an arithmetic expression.

Hereinafter, embodiments of the present invention in which the above objects can be specifically realized will be described in detail with reference to the accompanying drawings. In the description of the embodiments, the same names and symbols are used for the same components, and further description thereof will be omitted.

FIG. 2 is a flow chart of a method for calculating a quantity for an unfinished object according to the present invention, FIG. 3 is a flowchart showing a main reference object according to the present invention, FIG. 4 is a diagram illustrating a tree structure between a main reference object and a sub-reference object according to the present invention. FIG.

The method of managing the project operation using the BIM will be described in detail with reference to FIG. As shown in the figure, a project operation management method using BIM is performed in a computer using 3D modeling data (S100) constructed by a 3D modeling program and process management data (S300) created by a process management program . Specifically, the project management method using the BIM according to the present invention includes the step of registering the name of the project first (S10), the process data including the xml file and the 3D modeling program (S100) in the process management program (S300) The BIM attribute building information data is uploaded and stored (S200). Next, a building object data extraction step (S210) for extracting building object data from the stored BIM attribute building information data is performed. In the extracted building object data, a work type object allocation step (S230) is performed in which a work type object is allocated to each type of work. Next, a data mapping step (S240) in which data is mapped to process management data as a work type object is allocated, a quantity calculation step (S250) in which activity information, schedule information and quantity information data are calculated while data is mapped A data transfer step S260 of transferring the calculated data to the project management system, and a step S270 of inputting or transmitting the established history information managing the readiness by the data transmitted from the data and program management system additionally transmitted . In addition, the project management system transmits changes of the project and the like to the existing information in order to manage the existing history (S280).

The data upload / storage step (S200) includes a step of uploading / storing the BIM attribute building information data converted from the 3D modeling program into the IFC file, and a step of uploading / And the structure history master data is uploaded / stored. The two steps may be mutually exclusive. The BIM attribute building information data consists of property information of the building object itself such as shape, category, family, and type for the objects of the building structure, and numerical information about length, quantity, area and volume. In addition, when the data includes a plurality of layers, the data includes the number of layers in which the object is located and position information composed of portions designated in each layer.

In the building object data extraction step (S210), property information about the shape, category, family, and type of objects constituting the building structure, numerical information of length, quantity, area and volume, The location information of the building object data is extracted. That is, from the BIM attribute building information data, position information indicating which layer of the building constitutes one object constituting the building and attribute information such as the shape, name, and purpose of the object held by the object , Numerical information such as a length, a quantity, an area, and a volume displayed along with the attributes of each object are extracted. That is, attribute information having information such as a material, finishing or size, and numerical information corresponding thereto are extracted together with names, uses, and the like of wall, ceiling, floor,

The work type object assigning step (S230) is a step for inputting the work type information to the extracted building object data. That is, the 3D data forming the building structure and the process management data can not be matched with each other, so that the building objects, which are individual units of the building structure, and the process management data can be mapped to each other. Therefore, in order to map the process management data to the building object data, the name and description of the work type object, which is the type information of the process management data, should be allocated. The work type object assignment step refers to inputting a work type object for an individual object of the building object data. The name and description of the work object are first loaded automatically from the standard object description master by the name and description. The criterion to input is based on the category, family, and type of the building object. That is, the building object having the same category, family, and type as the category, family, and type data of the standard object description master automatically enters the details of the object type, details of the category, family, and type of the standard object description master. The step of assigning the work type object is completed by adding or deleting the automatically inputted work type object according to the project. In addition, the name and description of the work type object can be added from the breakdown master data of the project work breakdown structure (WBS). In addition, the name and description of the work type object and the detail code for distinguishing the work type object may be further included. Details of the work type object include specifications, units, calculation formulas and the like, and the formula is inputted according to the name of each work type object.

The data mapping step S240 is a step in which the project task description structure history master data and the building object data to which the work type object is allocated are mapped. Once the work object is assigned to the building object data, the object is automatically mapped, and then a quantity calculation step is performed to calculate various data according to the mapping (S250). The data includes activity information, which is operation information on a process object of the individual work object for the building object, schedule information of individual work object, and quantity calculation information. The quantity calculation information may include a quantity of the calculated work type object and a specification or cost which is a detailed specification of the quantity.

The data transferring step S260 is a step of transferring various data calculated in the step of calculating the amount of water (S250) to the project management system. In general, the project management system transmits activity information, schedule information and quantity calculation information, which are data for managing the project. The activity information is work information that should be made to build a building. That is, each activity must be performed to build a building, and each activity is eventually included in the work object.

The basic information input and transmission step S270 inputs and manages the basic information according to the activity information calculated in the quantity calculation step S250, the schedule information and the quantity calculation information, and the execution schedule transmitted from the project management system. In other words, the managed project management system, such as whether or not the work is completed and the payment has been made, is transmitted to the ready-made data such as the execution schedule and the ready-made payment time, and the ready-made history information may be transmitted back to the project management system have.

If there is a schedule change or a design change, an instruction is sent directly to the process management program or 3D modeling program from the project management system. Then, the modeling engineer changes the design drawing through the 3D modeling program and converts it into an IFC file, And the operation schedule and the schedule change are changed into the XML file after the schedule is changed in the process management program, and transmitted to the BIM operation management system, and the same procedure as above is repeatedly performed.

to the next. A process for calculating a quantity of a non-created object by 3D modeling will be described with reference to FIG. As shown in the figure, the IFC file is downloaded from the 3D modeling program S100 (S110). And edits the downloaded IFC file to generate data for an unexecuted object (S120). The generated data includes a main reference object and a sub-reference object, and each reference object is assigned an additional process object for each object. Objects of large size, small size, and small size are assigned to the work type objects, and each reference object to which the work type objects are allocated is managed by being mapped together with data on the project operation management system through the data mapping step (S240). In step S260, the data mapped data is extracted through the activity information, schedule information, and quantity calculation information data extraction step S250, and the extracted data is transmitted to the project management system. . Hereinafter, a method of calculating the quantity of unfinished objects will be described in detail with reference to the drawings.

2 is a flowchart illustrating a method of calculating a quantity of a 3D modeling unimplemented object according to the present invention. As shown in the figure, (a) uploading and storing (S110) BIM attribute building information data converted from 3D modeling data; (b) searching for a floor object from the BIM attribute building information data (S121); (c) defining the searched floor object as a main reference object and listing each of the main reference objects (S123); (d) searching for a peripheral member that is in contact or collision with the listed primary reference object, searching for a wall and column object in contact with the edge of the primary reference object in the searched peripheral member, (S124) defining each of the first sub-reference objects as a sub-reference object; (e) defining a length in which the main reference object and the first sub-reference object are in contact with each other as a connection length L, and calculating the connection length L (S125); (f) defining and cataloging a ceiling, which is a top surface of the main reference object, as a second sub-reference object (S126); (g) defining a distance between the main reference object and the second sub-reference object as a ceiling height (H), and calculating the defined ceiling height (H) (S128); And (h) defining an unfinished object description by the 3D modeling on the main reference object and the first and second sub-reference objects, using the listed data and the digitized data as variables, And an arithmetic expression is given to calculate the quantity of unexposed objects (S129).

As described above, the BIM attribute building information data converted from the 3D modeling data is uploaded and stored (S110). The BIM attribute building information data is uploaded in the form of an IFC file, and the IFC file includes attribute information about the building object. The next step proceeds according to the flowchart (S120) of FIG. 2 as a method of calculating the quantity of the 3D modeling uncompleted object. Objects that are omitted when creating 3D modeling are 50 mm or less in thickness, such as a wall base, a wall finish, a baseboard finish, a ceiling molding finish, and the like. These elements can be calculated by using the total length of joint (L), ceiling height (H) and window area of the floor in total, and it is possible to calculate the quantity of floor, wall, window, .

First, a floor object is searched from the BIM attribute building information data stored in the IFC file (S121). The searched floor object is defined as a main reference object 10, and each defined main reference object 10 is listed (S123) and stored. Before defining the main reference object as a reference object, the main reference object is subjected to a step S122 in which whether the finishing material is first confirmed (S122). Since the floor object includes a structure object for forming a building structure, Only the floor object will require the finishing material. Therefore, it is necessary to first check whether the floor object is a floor material.

 Next, a peripheral member contacting or colliding with the main reference object 10 is searched, and a wall and a column object contacting the edge of the main reference object 10 in the searched peripheral member are searched. The searched wall and column are defined as the first sub-reference object 20, and the first sub-reference objects are cataloged (S124). The peripheral members that contact or collide with the main reference object 10 are searched using the Clash and contact checking algorithm used in the 3D modeling program.

Next, the length in which the main reference object 10 and the first sub-reference object 20 contact each other is defined as a joining length L, and the joining length L is calculated. The joint length (L) is easy to calculate when the building is a simple form, but it is not easy to calculate without borrowing the computer's hand when it is made in the form of an arc or multiple joint lengths. Therefore, the junction length L is automatically calculated using a computer.

Next, the ceiling object which is the upper surface of the main reference object 10 is extracted from the BIM attribute building information data, and the extracted ceiling object is defined and cataloged as the second sub-reference object 30 (S126). Since the ceiling object is composed of 3D modeling, it can be extracted from BIM data. Thus, the ceiling object 30 is extracted from the BIM data and is subjected to the following steps.

Next, the distance between the main reference object 10 and the second sub-reference object 30 is calculated and defined as a ceiling height H, and stored and cataloged (S128). Since the ceiling height H is the distance between the main reference object 10 and the second sub-reference object 30, it can be easily calculated.

Next, the main reference object 10 and the first and second sub-reference objects, which are cataloged data, and the junction length L and the ceiling height H, which are numerical data, Defining an unfinished object description by the 3D modeling in the reference object 20 and the second sub-reference object 30, and calculating an amount of the uncompleted object by assigning an arithmetic expression to the uncompleted object details in operation S129 It goes through.

In addition, the attribute of the first sub-reference object 20, which is a wall and a column object, is examined to find whether there is a door or a window above the joint length area, and the door or the window is defined as a third sub-reference object 21 . The searched third sub-reference object 21 is cataloged and stored (S127). Likewise, the third sub-reference object 21 extracts numerical data on the size from the attribute data of the third sub-reference object 21 and adds the extracted numerical data to the third sub-reference object 21 in 3D Defining an unfinished object breakdown by modeling, and calculating an amount of unfinished object by assigning an arithmetic expression to the unfinished object breakdown (S129).

FIG. 3 and FIG. 4 illustrate an example of calculating the quantity of a 3D non-created object according to the present invention. As shown in FIG. 3, various objects may be formed in one floor object 10. In FIG. 3, four wall objects 20: 20a, 20b, 20c and 20d, a column object 20e and a ceiling object 30 are shown in one floor object 10. In addition, the wall object 20 may include window objects 21a and 21b which are windows. 4 is a view showing a case where the floor object 10 and the wall object 20 extracted from the BIM data are in contact with each other and the wall object 20 (L: L1, L2, L3, L4) are calculated. Window objects 21 (21a, 21b, 21c) are formed on the wall objects 20b, 20d in Fig. The window object of 21c in the window object of Fig. 4 is not included because it does not contact the floor object 10. Fig.

Hereinafter, an example of calculating the amount of finishing material according to the present invention will be described.

Create object	Object type	Object-specific attribute length	Bond length (L)	Windows belonging to the partition wall	Target window
NOTE Reference object	Bottom: Cement mortar 30 mm Granite 30 mm above	-	-
PART 1 REFERENCE OBJECT-1	Wall: Cement brick 1.0B	6m	4.3m
PART 1 REFERENCE OBJECT-2	Wall: Dry Wall 150㎜	3.2m	3.2m	SD-1	SD-1
Part 1 Reference object-3	Wall: Concrete wall 200㎜	5.8m	4.3m
Part 1 Reference object-4	Wall: Cement brick 1.0B	6.2m	3.2m	AW-1, AW-2	AW-1

[Table 1] is a numerical value for each object shown in FIG. As shown in the figure, the object specific attribute length, the joint length L, and the window to be calculated are shown in the table.

Real name	part	Deadline information
	Office 1	Racket	Seramine paint / baseboard height (h) = 100
wall		Water-based paint

Table 2 shows the necessary finishing materials when the floor object 1 of FIG. 4 belongs to the office 1. The area where the finishing material is required is a baseboard and wall with a height (h) of 100 from the floor object to the top. The finishing information indicates that the portion corresponding to the height of the baseboard (h) is painted with seramine paint, and the wall is painted with water-based paint.

Variable symbol	Variable name
CH	Floor height (H)
FCL	Bond length (L)
WDA	Total deducted area
WDL	Door width total
WWL	Window Width Total

[Table 3] shows variable symbols and variable names to be used in the quantity calculation formula. The variable symbol CH is a variable for the floor height, that is, the ceiling height (H), the FCL is a variable for the joint length (L), the WDA means the sum of the areas to be subtracted from the formula, the WDL is the total door width, WWL is the sum of the Window width. Even though the given formula is the same, the quantity calculation formula to be applied depends on the type of the back wall, and the quantity calculation formula is defined for each type, and the calculation formula is applied according to the definition, and the following is merely one example. Hereinafter, the details of automatically calculating the quantity of water are displayed by using the above numerical value and the quantity calculation formula given.

Object ID: hsdlfj1254316fsd Object Type - Wall: Dry Wall 150㎜

History code	designation	standard	unit	Quantity calculation formula	Calculation equation	Quantity
AR09030053	Water-based paint	Board face, line putty	㎡	FCL * CH-WDA	3.2m * 2.7m-2.1m2	6.54
AR09030110	Ceramine paint	h = 100, the board surface	m	FCL-WDL	3.2m-1.0m	2.2
AR11020110	Curtain box	120 * 120 (w * h)	m	WWL	0m	0
AR11020220	molding	AL	m	FCL-WWL	3.2m-0m	3.2

Table 4 shows the finishing material for the first sub-reference object-2 shown in Fig. As shown in the table, the object ID of the first sub-reference object 2 is defined, the object type of the first sub-reference object is taken from the attribute information, and the object type is Dry Wall 150 mm as shown in Table 1 . Part 1 An object description for an uncompleted object for a reference object should be defined. In the above table, a description for an uncompleted object is defined by a history code. In addition, the history codes are respectively defined according to the object ID. As shown in Table 2, the wall is provided with a water-based paint as a finish. Drywall is generally made of gypsum board, and gypsum board is made by attaching gypsum board to the wall, so it is accompanied by a line putty for gypsum board. Therefore, water-based paint is applied to the board surface and the line putty constituting the wall surface. Therefore, the area to be painted with water-based paint becomes the quantity to which the finish is applied. The calculation formula for calculating this is FCL * CH-WDA. In Table 1, the joint length (L) is 3.2 m and the ceiling height SD-1, the area of the inquiry is taken from the property information and stipulated as 2.1m2), so it becomes FCL * CH-WDA. Therefore, the amount of water-based paint corresponding to 3.2 m * 2.7 m-2.1 m 2 = 6.54 m 2 is calculated. The same applies to the remaining unexplained object details.

Object ID: vnjkder1254678hcd Object type - Wall: Cement brick 1.0B

History code	designation	standard	unit	Quantity calculation formula	Calculation equation	Quantity
AR05020215	Apply cement mortar	Wall, 18 mm	㎡	FCL * CH-WDA	3.2m * 2.7m-2.4㎡	6.24
AR09030010	water paint	Mortar face	㎡	FCL * CH-WDA	3.2m * 2.7m-2.4㎡	6.24
AR12010201	Baseboard bead	Zinc cover	m	FCL-WDL	3.2m-0m	3.2
AR09030105	Ceramine paint	h = 100, the molten surface	m	FCL-WDL	3.2m-0m	3.2
AR11020110	Curtain box	120 * 120 (w * h)	m	WWL		2m	2
AR11020220	molding	AL	m	FCL-WWL	3.2m-2m	1.2

Table 5 is for the first sub-reference object -4. The first sub-reference object -4 is listed and has a unique ID, and the cement brick 1.0B, which is the object type of the wall, is extracted from the attribute information. Details of the unfinished object can be grasped from the extracted attribute information of the first subproject object-4. Details of the finishing material that is not yet created in 3D are described in the name field. Also, for each finishing material, since the first sub-reference object-2 and the object ID are different, they have codes of different object details. Table 5 is also calculated in the same manner as in Table 4 above. The cement mortar listed in the name box is made on the wall and its thickness is normalized to 18 mm, so the area of the mortar to be painted on the wall is FCL (joint length) * CH (ceiling height) -WDA And the window area can be taken from the property information and its value is defined as 2.4m2), and it is calculated as 3.2m * 2.7m-2.4m2 = 6.54m2, and thus the thicknesses 18mm and 6.54m2 You can calculate the quantity of mortar finish needed. The remainder is calculated in the same way, but the corresponding formula can be different.

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.

The present invention relates to a method for calculating a quantity of a 3D modeling unimplemented object, and more particularly, to a method for calculating a quantity of BIM (3D modeling unobtained object), for a BIM (Builing Information Modeling) It is a technology that can be used to automatically calculate the volume of unexplored objects by utilizing 3D modeling data created by using the invention.

Claims (4)

1. A method for calculating a quantity for a 3D modeling unimplemented object,

   (a) uploading and storing BIM attribute building information data converted from 3D modeling data;

   (b) searching a floor object from the BIM attribute building information data;

   (c) defining the searched floor object as a main reference object and listing each of the main reference objects;

   (d) searching for a peripheral member that is in contact or collision with the listed primary reference object, searching for a wall and column object in contact with the edge of the primary reference object in the searched peripheral member, Defining a sub-reference object, and cataloging each of the sub-reference objects;

   (e) defining a length in which the main reference object and the first sub-reference object are in contact with each other as a connection length (L), and calculating the connection length (L);

   (f) defining and cataloging a ceiling, which is a top surface of the main reference object, as a second sub-reference object;

   (g) defining a distance between the main reference object and the second sub-reference object as a ceiling height (H), and calculating the ceiling height (H) defined above; And

   (h) defining an unstructured object description by 3D modeling on the main reference object and the first and second sub-reference objects, using the listed data and the digitized data as variables, Calculating an amount of a non-created object by giving an expression;

   And calculating the quantity of the 3D modeling unimplemented object.
2. The method according to claim 1,

   (i) examining the attributes of the first sub-reference object to search for the presence of a door or window above the joint length field, and defining the statement or window as a third sub-reference object, And creating and storing 3D modeling unimportant objects.
3. 3. The method of claim 2,

   (j) extracting numerical data on the size from the attribute data of the third sub-reference object listed above, and defining an unfinished object description in the third sub-reference object by using the extracted numerical data as a variable And calculating an amount of an uncompleted object by assigning an arithmetic expression to the uncompleted object specification, and calculating an amount of the unimpleted object.
4. The method according to claim 1,

   and checking whether the finish material is created by reviewing the attributes of the bottom object in step (b).

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