From the purchase of land to the completion acceptance, delivery and final accounts after the completion of the project construction, there are strict and clear policies and regulations on the examination and approval of the project budget, the review and calculation of its cost composition; Under the condition of China's socialist market economy, it has a strong policy and planning, so we must follow the law of value of market economy and pay attention to investment and business activities under the condition of combining planning with market. The establishment of construction projects is not only restricted by the development of national, local and industrial market economy, but also by the macro-control of national industrial policies, industrial structure, investment direction, financial policies and technical and economic policies. It is also restricted by the development of science and technology, changes in market demand, market rules and labor, market rules, labor, raw materials, equipment and other means of production and financial market changes, as well as the energy, transportation, logistics, social and human environment under the influence of national macroeconomic sustainable development.
2) Regional and market factors
Engineering construction products exist in different geographical spaces, and their product prices are inevitably affected by the time, space, natural conditions, social and market soft and hard environments in the region. The value of engineering construction products is the result of labor, materials, machines and tools, capital, energy and technology investment. Different regional and market conditions will have a direct impact on the formation of the above input conditions and project costs. In addition, due to the different landform, topography, geology and hydrogeological conditions of the construction site, it will also have a great impact on the project budget. Even for buildings or structures with the same design drawings, there will be great differences at least in the treatment of site conditions and the cost of foundation projects. Local technical cooperation, material supply, transportation, logistics, market price, on-site construction and other construction conditions, as well as the quota level of local enterprises, will be reflected in the project budget price.
3) Design factors
Design drawings are one of the basic basis for compiling project budget. We must pay attention to improving the ability to read drawings and understand design intentions, and also understand design specifications, standards and related technical knowledge.
4) The development of building installation production technology and the influence of production efficiency improvement factors.
Nowadays, science is developing at a high speed. The accelerated development of industry and construction technology will continuously improve production efficiency, reduce installation, production and construction costs, pay attention to the changes of industry costs, individual enterprise costs and price levels, and use market competition mechanism to select contractors will have a great impact on the project contract price. The organization design (or construction scheme) of engineering installation construction and engineering technology, environmental protection and safety measures will also have a great impact on the preparation of engineering budget.