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If it is owned, there is a depreciation cost（ 3) The daily wage of concrete workers, their work efficiency, concrete loss rate and depreciation cost reflect the level of enterprise construction management.
Therefore, the enterprise quota of cast-in-situ reinforced concrete columns will be determined（ 4) If the engineering project changes, such as the section size of the column, the quantities data will be updated automatically.
Figure 1: cost “recipe” for a cast-in-situ reinforced concrete column In the construction stage, the basis of fine cost control is to split the construction process, that is, each component should be divided into processes that can be priced by people, materials and machines, so as to accurately associate the quantities of components with costs and processes, that is, 5dbim management.
When a construction enterprise uses this 5dbim cost management for the first time, it takes more time to establish the enterprise quota template, that is, the labor wage level and labor productivity of different types of work, the unit price and loss of various materials, the shift cost and efficiency of various mechanical equipment, etc.
Each process has the cost of people, materials and machines（ 2) Taking the process of pouring concrete as an example, it involves the cost items of concrete worker (person), commercial concrete (material) and vibrator (machine).
Once the project wins the bid and starts construction, the construction enterprise’s task of cost management at this stage should take cost control as the goal, effectively control the rational use of people, materials and machines, make accurate and efficient settlement with subcontractors, and strive for the maximum profit for the project.
” The purpose of the budget in the bidding stage is to quickly and accurately obtain the direct cost of the project, and then consider taxes and reasonable profits to determine a competitive quotation.
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“ The basis of fine cost control in the construction stage is the splitting of the construction process, that is, each component should be split into processes that can be priced by people, materials and machines, so as to accurately associate the quantities of components with costs and processes.
The labor cost of the reinforced concrete column can be obtained by combining the labor cost of the concrete worker per working day with the work efficiency of the concrete worker (how many cubic meters of concrete can be poured per working day).
The reason why it is called a recipe is a visual metaphor.
Combined with the cost calculation template described above, the cost changes caused by the change will also be generated automatically and can be clearly compared with the original cost items.
Similarly, the unit price of commercial concrete plus the loss rate determines the material cost.
However, once the enterprise quota template is mature, it can directly connect the quantities of BIM model, quickly generate the direct cost based on enterprise quota, and compare it with the direct cost generated based on local quota, which can more effectively support bidding quotation.
Finally, if the vibrator is rented, there is a rental cost.
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For example, the cost of local labor employed by an enterprise in construction projects in different cities can be adjusted flexibly.
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For example, if you want to calculate the direct cost of a plate of scrambled eggs with tomatoes, you need to split the dish into different cooking steps (processes), and each step has the cost of Chef (person), ingredients (material) and cooking utensils (machine).
For the process level cost management in the construction stage, a “recipe” method is usually adopted.
As shown in the cast-in-situ reinforced concrete column in Figure 1: (1) The recipe of cast-in-situ reinforced concrete column is composed of four processes: binding reinforcement cage, formwork support, concrete pouring and surface maintenance.
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The volume data of reinforced concrete can be obtained from BIM model.
The data in the enterprise quota does not need to remain unchanged, but can be dynamically adjusted according to the market situation.
