Engineering cost calculation method

Abstract

The invention discloses a project cost calculation method, which relates to the technical field of project cost and comprises the following steps of data acquisition, cost calculation, calculation of original material cost, original labor cost and other cost, cost optimization, new material cost obtaining, new labor cost obtaining and cost summarization. The new material cost, the new labor cost and other costs are summarized by using a total project cost algorithm to obtain the total project cost, and meanwhile, the budget cost is set, and a cost report is compiled, so that the new material cost and the new labor cost are obtained by fully considering the fluctuation of key factors such as the material price and the labor cost; the deviation of the actual cost of cost calculation is reduced, then the total project cost is obtained by summarizing the total project cost algorithm, the total project cost is reduced by comparing the total project cost with the budgeted cost and adjusting the labor efficiency, and the effects of dynamically adjusting the total cost and preventing the project cost from exceeding the budgeted cost are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering cost, and in particular to an engineering cost calculation method. Background Art

[0002] Project cost refers to the construction price of a project, that is, the total amount of all costs expected or actually required to complete the construction of a project. At present, the cost budgets of most projects in my country are calculated by cost calculators based on the market prices of various materials, adjustment indexes, project costs and preliminary design quantity lists regularly released by cost management departments of provinces, cities and autonomous regions, and are obtained through collection and summary calculation.

[0003] The existing project cost calculation method lacks consideration of fluctuations in key factors such as material prices and labor costs, and fails to reflect them in the cost calculation in a timely manner, resulting in a large deviation between the cost estimation results and the actual costs incurred. The total project cost cannot be dynamically adjusted according to changes in the market environment and the actual situation of the project, resulting in the project cost exceeding the budget. Summary of the invention

[0004] The purpose of the present invention is to provide a method for calculating engineering cost, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides a method for calculating construction cost, comprising the following steps:

[0006] Step S1: data acquisition, obtaining the original engineering data and storing it in the database;

[0007] Step S2: compile a bill of quantities, obtain the bill of quantities in the original data of the project from the database, and compile a material list, a labor list and other consumption lists according to the bill of quantities;

[0008] Step S3: Cost calculation, by combining the current market price and the bill of quantities, calculate the original material cost M ori , original labor cost L ori and other expenses Q;

[0009] Step S4: Cost optimization, using the material optimization algorithm to optimize the original material cost M ori Optimize and get the new material cost M adj , and then use the artificial optimization algorithm to calculate the original labor cost L ori Optimize and get the new labor cost L adj ;

[0010] Step S5: Cost summary, using the total project cost algorithm to calculate the new material cost M adj , New labor cost L adjSummarize with other costs Q to get the total project cost C final , and set the budget cost Z and compare it with the total project cost C final Compare and judge the total project cost C final Is it greater than the budget cost Z?

[0011] Step S6: Prepare the cost report, the total cost of the project C final If the total construction cost is not greater than the budget cost Z, the total construction cost C final The calculation process is compiled into a cost report, which lists the detailed composition of each cost to ensure transparency and auditability.

[0012] Optionally, the material optimization algorithm formula in the cost optimization step is as follows:

[0013]

[0014] Among them, M adj It is the cost of new materials;

[0015] M ori It is the original material cost;

[0016] is the rate of change of the material price index;

[0017] P t is the current period material price;

[0018] P t－1 is the material price in the previous period;

[0019] α is Influence coefficient;

[0020] The specific process is as follows:

[0021] According to the material price index change rate Cost of original materials M ori Through optimization, the adjustment of material costs has a high degree of flexibility. According to changes in the market environment, the value of α is adjusted to control the increase or decrease of material costs, so as to maintain the accuracy of cost control when facing fluctuations in material costs.

[0022] Optionally, the manual optimization algorithm formula in the cost optimization step is as follows:

[0023]

[0024] Where L adj It is the new labor cost;

[0025] L ori It is the original labor cost;

[0026] It is labor efficiency;

[0027] G act is the actual working hours;

[0028] G std It is standard working hours;

[0029] β is Influence coefficient;

[0030] The specific process is as follows:

[0031] Through actual working hours act Standard working hours std By comparing the labor efficiency, it is possible to quantitatively evaluate the labor efficiency so that managers can optimize the allocation of production resources.

[0032] Optionally, in the cost summary step, the total project cost algorithm formula is as follows:

[0033]

[0034] C final is the total project cost;

[0035] M adj It is the cost of new materials;

[0036] L adj It is the new labor cost;

[0037] Q is other expenses;

[0038] R tot is the cost adjustment rate of this project;

[0039] R avg is the industry average cost adjustment rate;

[0040] γ is the cost adjustment coefficient;

[0041] The specific process is as follows:

[0042] By final The cost adjustment rate R of this project is introduced tot and the industry average cost adjustment rate R avg , can flexibly adjust the total cost according to changes in the market environment to reflect the actual cost situation. By introducing the cost adjustment coefficient γ, it can balance the impact of changes in the market environment on the project cost, avoid adverse effects on the project due to excessive fluctuations, and facilitate managers to control costs;

[0043] Set the total project cost C final The budget cost Z is:

[0044] Z=(Mori +L ori +Q)*110%

[0045] Z is the budget cost;

[0046] M ori It is the original material cost;

[0047] L ori It is the original labor cost;

[0048] Q is other expenses;

[0049] The specific process is as follows:

[0050] When the total project cost C final When it is greater than the budget cost Z, adjust the β value in the manual optimization algorithm formula to increase its value to improve labor efficiency and reduce the total project cost C final .

[0051] Optionally, the original engineering data also includes design drawings, bills of quantities, geographic information, environmental information assessment reports and historical project data.

[0052] Optionally, the database includes a pre-regulation library, a quota library, an equipment library, a main material library, a survey library and an additional information library, and the content in the database is updated regularly according to changes in the market environment.

[0053] Optionally, the other expenses Q include equipment rental fees, transportation fees, taxes, and engineering insurance premiums.

[0054] Optionally, the cost report includes a total budget table, a partial budget table and a single project budget table. The cost report is continuously updated during the construction of the project to track the deviation between the actual cost and the budget. The prepared cost report is submitted to relevant departments for review and approval to ensure that the budget report complies with laws, regulations and company regulations.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. The material optimization algorithm formula of the present invention optimizes the original material cost according to the rate of change of the material price index, and adjusts the value of α to control the increase or decrease of the material cost according to the changes in the market environment, so as to maintain the accuracy of cost control when facing material cost fluctuations. The manual optimization algorithm formula quantitatively evaluates the level of labor efficiency by comparing the actual working hours with the standard working hours, providing an intuitive and accurate basis for management personnel, enabling them to accurately understand the production efficiency status and reasonably allocate production resources, thereby reducing the error between the actual cost and the estimated result. The total project cost calculation formula combines the new material cost and the new labor cost, and introduces the cost adjustment of this project at the same time. The rate and the industry average cost adjustment rate can flexibly adjust the total project cost according to changes in the market environment, and through the introduction of the cost adjustment coefficient γ, it can balance the impact of changes in the market environment on the project cost, avoid adverse effects on the project due to excessive fluctuations, and compare the total project cost with the budget cost Z, and decide whether to reduce the total project cost by adjusting labor efficiency based on the comparison results, thereby realizing dynamic adjustment of the total cost. The above algorithm formulas influence each other and together constitute the project cost calculation process, ensuring the accuracy and rationality of the project cost, ensuring profits while maintaining project quality, and improving the project cost calculation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Embodiment 1:

[0060] See also Figure 1 This embodiment provides a technical solution: a method for calculating engineering cost, comprising the following steps:

[0061] Data acquisition, obtaining the original engineering data and storing it in the database;

[0062] Prepare bill of quantities, obtain bill of quantities in the original project data from the database, and compile material bills, labor bills and other consumption bills based on the bill of quantities;

[0063] Cost calculation, by combining the current market price and the bill of quantities, calculate the original material cost M ori , original labor cost Lori and other expenses Q;

[0064] Cost optimization, using material optimization algorithm to optimize the original material cost M ori Optimize and get the new material cost M adj , and then use the artificial optimization algorithm to calculate the original labor cost L ori Optimize and get the new labor cost L adj ;

[0065] Cost summary, using the total project cost algorithm to convert the new material cost M adj , New labor cost L adj Summarize with other costs Q to get the total project cost C final , and set the budget cost Z and compare it with the total project cost C final Compare and judge the total project cost C final Is it greater than the budget cost Z?

[0066] Prepare cost report, total project cost C final If the total construction cost is not greater than the budget cost Z, the total construction cost C final The calculation process is compiled into a cost report, which lists the detailed composition of each cost to ensure transparency and auditability.

[0067] More specifically, in this embodiment: by adjusting the raw material cost M according to the changes in the market environment ori and original labor cost L ori Based on the optimization, the fluctuation of key factors such as material price and labor cost is fully considered to obtain the new material cost M adj and new labor cost L adj , thereby reducing the deviation of the actual cost in the cost calculation, and then using the total project cost algorithm to calculate the new material cost M adj , New labor cost L adj Summarize with other costs Q to get the total project cost C final By comparing the total project cost with the budget cost Z, it is decided whether to reduce the total project cost by adjusting labor efficiency based on the comparison results, thereby realizing dynamic adjustment of the total cost and avoiding the project cost exceeding the budget.

[0068] Furthermore, the design drawings in the original project data include design drawings of buildings, structures, water supply and drainage, electrical equipment, etc. The geographic information includes geographic information data such as the topography, geological conditions, and soil properties of the project site, which are used for subsequent engineering construction, foundation design, and underground pipeline layout. The environmental information assessment report includes the environmental impact of the project, safety risk assessment, and impact analysis report on the surrounding environment, which are used for environmental approval and supervision. The historical project data includes historical data and experience of similar projects for reference and comparison.

[0069] Furthermore, the material optimization algorithm formula in the cost optimization step is as follows:

[0070]

[0071] Among them, M adj It is the cost of new materials;

[0072] M ori It is the original material cost;

[0073] is the rate of change of the material price index;

[0074] P t is the current period material price;

[0075] P t－1 is the material price in the previous period;

[0076] α is Influence coefficient.

[0077] Specifically, according to the rate of change of the material price index Cost of original materials M ori Optimize and adjust the value of α to control the increase or decrease of material costs according to changes in the market environment, so as to maintain the accuracy of cost control when facing fluctuations in material costs, and ultimately improve the accuracy of the total project cost. Reflects the actual fluctuation of material prices, making the new material cost M adj It can closely follow the market dynamics and timely reflect the changes in material prices. By adjusting the value of α, project managers can control the risks brought by fluctuations in material costs. When predicting that material prices will rise sharply, they can appropriately reduce the value of α to mitigate the impact of the increase in material costs on the total project cost C. final When the market material price drops, appropriately increasing the value of α can further reduce material costs and improve the economic benefits of the project.

[0078] Furthermore, the formula of the manual optimization algorithm in the cost optimization step is as follows:

[0079]

[0080] Where L adj It is the new labor cost;

[0081] L ori It is the original labor cost;

[0082] It is labor efficiency;

[0083] G act is the actual working hours;

[0084] G std It is standard working hours;

[0085] β is Influence coefficient;

[0086] The specific process is as follows:

[0087] Through actual working hours act Standard working hours std By comparing the labor efficiency, it is possible to quantitatively evaluate the labor efficiency so that managers can optimize the allocation of production resources.

[0088] Specifically, through labor efficiency data, actual working hours G act Standard working hours std The comparison can quantitatively evaluate the level of labor efficiency, provide managers with an intuitive and accurate basis, facilitate accurate understanding of the efficiency status of the production process, and enable project managers to allocate production resources more reasonably. For example, for production links with low labor efficiency, they can increase manpower or introduce more efficient equipment, while for links with high labor efficiency, they can maintain the status quo or transfer part of the manpower to other production links, thereby optimizing resource allocation, reducing production costs, and improving overall production efficiency.

[0089] Furthermore, the total project cost calculation formula is as follows:

[0090] The total project cost calculation formula is as follows:

[0091]

[0092] C final is the total project cost;

[0093] M adj It is the cost of new materials;

[0094] L adj It is the new labor cost;

[0095] Q is other expenses;

[0096] Other expenses Q include equipment rental fees, transportation fees, taxes, and engineering insurance premiums;

[0097] The fees incurred for leasing various equipment, such as cranes, excavators, concrete mixers, etc.; transportation costs refer to the costs incurred for transporting the materials, equipment and construction personnel required for the project from the supply location to the construction site. Transportation costs include the fees for the use of transportation tools, fuel costs and related maintenance and management costs; taxes refer to various taxes and surcharges, including value-added tax, business tax and income tax; engineering insurance premiums are the insurance costs purchased to insure against unexpected losses or risks occurring during the construction process of the project, including accidental loss insurance during construction and contractor liability insurance.

[0098] R tot is the cost adjustment rate of this project;

[0099] R avg is the industry average cost adjustment rate;

[0100] γ is the cost adjustment coefficient, which is used to balance the impact of market changes on project costs, so that managers can better control cost risks. In periods of large market fluctuations, the value of the cost adjustment coefficient γ can be appropriately increased to increase the flexibility of the total cost. In periods of relatively stable markets, the value of the cost adjustment coefficient γ can be appropriately reduced to control the fluctuation range of the total cost.

[0101] Specifically, by final The cost adjustment rate R of this project is introduced tot and the industry average cost adjustment rate R avg It can flexibly adjust the total cost according to changes in the market environment to reflect the actual cost situation. By introducing the cost adjustment coefficient γ, it can balance the impact of changes in the market environment on the project cost and avoid adverse effects on the project due to excessive fluctuations. It is convenient for managers to control costs and realize dynamic adjustment of the total cost.

[0102] Set the total project cost C final The budget cost Z is:

[0103] Z=(M ori +L ori +Q)*110%

[0104] Z is the budget cost;

[0105] M ori It is the original material cost;

[0106] L ori It is the original labor cost;

[0107] Q is other expenses;

[0108] The specific process is as follows:

[0109] When the total project cost C final When it is greater than the budget cost Z, adjust the β value in the manual optimization algorithm formula to increase its value to improve labor efficiency and reduce the total project cost C final .

[0110] Specifically, according to the total project cost C final Compare with the budget cost Z, and decide whether to reduce the total project cost C by adjusting labor efficiency based on the comparison results final Compared with directly cutting material costs or sacrificing project quality to reduce costs, reducing costs by improving labor efficiency is usually more sustainable and has less impact on project quality. Improvements in labor efficiency can come from more efficient construction methods, more advanced tools, or more professional workers, which can reduce costs without sacrificing quality, thereby reducing the total project cost C. final The deviation from the budget cost Z avoids the total project cost C final Exceeding the budget, ensuring profits while maintaining project quality, and improving the quality of project cost calculations.

[0111] Furthermore, the database includes a pre-regulation library, a quota library, an equipment library, a main material library, a survey library and an additional information library, and the content in the database is updated regularly according to changes in the market environment.

[0112] Specifically, the budget database includes basic budget data for various typical engineering projects, such as basic quotas, rates or unit prices for building area, volume, length, etc., which are used for preliminary budget estimates and provide a basis for initial project decisions. The quota database includes detailed engineering quantities and corresponding quotas for construction projects, such as unit engineering quotas for concrete pouring, masonry construction, steel structure installation, etc., which serve as a reference and basis for the preparation of the bill of quantities to ensure the accuracy and completeness of the engineering quantities. The equipment database includes detailed data such as models, specifications, rental or purchase costs, and usage requirements of various construction equipment, which are used for equipment selection, rental or purchase decisions, and construction progress metering.

[0113] The main material library includes information such as the brand, specification, unit price, quantity, supplier, etc. of commonly used building materials and main materials required for specific projects. It is used for material procurement, supply chain management and cost control to ensure the quality and timeliness of material supply during the construction process. The original material cost M can be calculated through the unit price, quantity and other information of the materials in the main material library. ori The survey database includes adjustment factors or adjustment rates that take into account market changes, seasonal factors, regional differences, etc. The additional information database includes additional information such as project historical data, technical information, legal documents, environmental impact assessment reports, etc., which are used as auxiliary information for project management and decision-making.

[0114] Furthermore, the cost report includes the total budget table, divisional budget table, and single project budget table. The cost report is continuously updated during the construction of the project to track the deviation between actual cost and budget. The prepared cost report is submitted to relevant departments for review and approval to ensure that the budget report complies with laws, regulations and company regulations.

[0115] Specifically, the total budget table is a table that summarizes and summarizes the cost budget of the entire project. It includes the sum of all costs, including the cost of new materials M. adj , New labor cost L adj and other expenses Q. By compiling them in the form of a table, it is convenient for managers to understand the overall cost profile of the entire project. The divisional budget table divides the entire project into several parts or areas according to function and space, and lists specific budget details and amounts for each part or area. For example, it can be divided according to building structure, mechanical and electrical equipment, decoration and renovation, etc. Each divisional budget table lists the various expenses of that part in detail. The divisional budget table helps to gain an in-depth understanding of the cost structure of each part of the project and achieve targeted cost control and management. Through the divisional budget table, the responsibilities and tasks of each department or team can be clearly divided to reduce cost errors and risks. The single project budget table is a more detailed budget refinement table based on the divisional budget table, which further subdivides the project into specific construction units or engineering projects, such as the budget for a certain floor or component of a building. The single project budget table includes unit engineering quantity cost and total cost information. The single project budget table provides a detailed cost budget for specific construction units in the project to ensure the accuracy and accuracy of the project cost.

[0116] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for calculating construction cost, characterized in that: The following steps are involved: Step S1: data acquisition, obtaining the original engineering data and storing it in the database; Step S2: compile a bill of quantities, obtain the bill of quantities in the original data of the project from the database, and compile a material list, a labor list and other consumption lists according to the bill of quantities; Step S3: Cost calculation, by combining the current market price and the bill of quantities, calculate the original material cost M ori , original labor cost L ori and other expenses Q; Step S4: Cost optimization, using the material optimization algorithm to optimize the original material cost M ori Optimize and get the new material cost M adj , and then use the artificial optimization algorithm to calculate the original labor cost L ori Optimize and get the new labor cost L adj ; Step S5: Cost summary, using the total project cost algorithm to calculate the new material cost M adj , New labor cost L adj Summarize with other costs Q to get the total project cost C final , and set the budget cost Z and compare it with the total project cost C final Compare and judge the total project cost C final Is it greater than the budget cost Z? Step S6: Prepare the cost report, the total cost of the project C final If the total cost of the project is not greater than the budget cost Z, the total cost of the project C final The calculation process is compiled into a cost report, which lists the detailed composition of each cost to ensure transparency and auditability.

2. The method for calculating construction cost according to claim 1, characterized in that: The material optimization algorithm formula in the cost optimization step is as follows: Among them, M adj It is the cost of new materials; M ori It is the original material cost; is the rate of change of the material price index; P t is the current period material price; P t－1 is the material price in the previous period; α is Influence coefficient; The specific process is as follows: According to the material price index change rate Cost of original materials M ori Adjustments are made to make the adjustment of material costs highly flexible. According to changes in the market environment, the value of α is adjusted to control the increase or decrease of material costs, making it easier to maintain the accuracy of cost control when facing fluctuations in material costs.

3. The method for calculating construction cost according to claim 2, characterized in that: The formula of the manual optimization algorithm in the cost optimization step is as follows: Where L adj It is the new labor cost; L ori It is the original labor cost; It is labor efficiency; G act is the actual working hours; G std It is standard working hours; β is Influence coefficient; The specific process is as follows: Through actual working hours act Standard working hours std By comparing the labor efficiency, the management can quantitatively evaluate the labor efficiency so as to optimize the allocation of production resources.

4. The method for calculating construction cost according to claim 3, characterized in that: In the cost summary step, the total project cost algorithm formula is as follows: C final is the total project cost; M adj It is the cost of new materials; L adj It is the new labor cost; Q is other expenses; R tot is the cost adjustment rate of this project; R avg is the industry average cost adjustment rate; γ is the cost adjustment coefficient; The specific process is as follows: By in the total project cost C final The cost adjustment rate R of this project is introduced tot and the industry average cost adjustment rate R avg According to the changes in the market environment, the total cost can be flexibly adjusted to reflect the actual cost situation. By introducing the cost adjustment coefficient γ, the impact of changes in the market environment on the project cost can be balanced to avoid adverse effects on the project due to excessive fluctuations, making it easier for managers to control costs; Set the total project cost C final The budget cost Z is: Z=(M ori +L ori +Q)*110% Z is the budget cost; M ori It is the original material cost; L ori It is the original labor cost; Q is other expenses; The specific process is as follows: When the total project cost C final When it is greater than the budget cost Z, adjust the β value in the manual optimization algorithm formula to increase its value to improve labor efficiency and reduce the total project cost C final .

5. The method for calculating construction cost according to claim 4, characterized in that: The original engineering data also includes design drawings, bills of quantities, geographic information, environmental information assessment reports and historical project data.

6. The method for calculating construction cost according to claim 1, characterized in that: The database includes a pre-regulation library, a quota library, an equipment library, a main material library, a survey library and an additional information library. The content in the database is updated regularly according to changes in the market environment.

7. The method for calculating construction cost according to claim 1, characterized in that: The other costs Q include equipment rental fees, transportation fees, taxes, and engineering insurance premiums.

8. The method for calculating construction cost according to claim 1, characterized in that: The cost report includes the total budget table, partial budget table and single project budget table. The cost report will be continuously updated during the construction of the project to track the deviation between actual cost and budget. The prepared cost report will be submitted to relevant departments for review and approval to ensure that the budget report complies with laws, regulations and company regulations.

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