Calculation Formula for Output Value of Prefabricated Houses
Currently, there is no direct and unified calculation formula for the output value of prefabricated houses, but it can be calculated by combining relevant principles. The following provides a detailed introduction from different scenarios:
Scenarios involving the production and installation of prefabricated components
When producing prefabricated components on the construction site, the value of the component production part can be calculated upon completion of production. This value mainly covers various costs consumed in the production of prefabricated components as well as corresponding profits, etc. For example, when producing prefabricated wall panels, it is necessary to consider the procurement costs of raw materials (such as cement and steel bars), labor costs during the production process, equipment depreciation costs, and the expected profits of the enterprise, etc. By integrating these factors, the value of the component production part can be determined.
When the prefabricated components are installed on the building to form an engineering entity, the installation costs are then calculated. Installation costs include labor costs and machinery usage costs during the installation process, etc. For instance, when using a crane to install a prefabricated wall panel at a designated location, the rental cost of the crane and the wages of the crane operator are all within the scope of installation costs. In this way, the output values generated in the two links of prefabricated component production and installation can be clarified separately.
Scenarios involving self-completed construction output value and subcontracted project output value
For an overall prefabricated house project, if there are cases of self-completed construction output value and subcontracted project output value, reference can be made to the calculation method of the total output value of the construction industry, that is, Total output value of the construction industry = Self-completed construction output value + Output value of subcontracted projects.
Among them, the self-completed construction output value refers to the value completed by the enterprise's own construction forces. This includes the value created by the enterprise organizing its own workers to carry out tasks such as the construction and installation of prefabricated houses, covering the benefits generated by the enterprise's own investment in human, material, and financial resources.
The subcontracted output value refers to the value of the parts completed by subcontracting units. In a prefabricated house project, the enterprise may subcontract part of the project to other professional units, such as subcontracting the electrical installation project of the prefabricated house to a professional electrical installation company. The value generated after the subcontracting unit completes this part of the project is the subcontracted output value, and this part of the output value should also be included in the total output value of the entire prefabricated house project.
