Principle of comprehensiveness. Cost control should control the whole process of cost formation, all expenses incurred and all personnel. In order to adapt to the development of modern cost accounting, it is necessary for all staff to manage costs, so that decision makers, departments and units attach importance to costs, everyone cares about costs, and improve the cost-benefit awareness and quality of all staff. Traditional cost management thought holds that cost management is the responsibility of specially designed cost management institutions and managers, but in fact, costs occur in various departments and links and are closely related to each employee. Therefore, cost management and control is not only the responsibility of the cost management organization, but also the responsibility of each department and every employee. Cost control should be all-round and whole-process control, including the analysis and research of all relevant factors affecting the cost before the product is put into production, the determination of production technology, the control of all expenses incurred in the production process of the product, and the cost analysis afterwards. ② The principle of economic benefit. Cost control is to reduce costs, and the purpose of reducing costs is to improve economic benefits. We should invest the least production resources and strive for the greatest economic benefits. But we can't ignore the quality of products, improve economic benefits and reduce costs. Enterprises should properly handle the relationship between output, quality, cost and benefit. In particular, they should reduce costs on the premise of ensuring product quality. If the product quality goes up and the reputation is good, the sales volume will increase, the total income will also increase and the profit will also increase.

③ The principle of combining responsibility with rights. In cost management, enterprises should establish a set of management system with corresponding responsibilities and rights for all employees to restrain and motivate employees. Clarify the responsibilities and scope of each department, each link and each employee in the cost management system, formulate target costs, and refine and deepen them. Make every link and every element have sub-goals, form the cost responsibility goals of departments and individuals, and give corresponding rights to ensure the full and effective performance of responsibilities. At the same time, the leaders of cost management should regularly check and assess the performance of various departments and teams in cost control, implement rewards and punishments, mobilize the enthusiasm and initiative of all employees to control and reduce costs, and form the consciousness of employees' independent management.

3 Project cost control measures The ways to reduce the cost of construction projects can be summarized into three aspects: technical measures, economic measures and organizational measures.

3. 1 technical measures ① Formulate advanced, economical and reasonable construction scheme to shorten the construction period, improve the quality and reduce the cost. The construction scheme includes four major contents: the determination of construction methods, the selection of construction machines and tools, the arrangement of construction sequence and the organization of flow construction. Different construction schemes, different construction periods, different machines and tools, and different expenses. Therefore, the correct choice of construction scheme is the key to reduce the cost. (2) In the construction process, try to find various technical measures to reduce costs, such as new processes, new technologies and new materials, so as to reduce consumption and improve work efficiency. (3) strictly control the quality, put an end to rework, shorten the acceptance time and save money.

3.2 Economic measures

① Labor cost control. Mainly to improve the labor organization and reduce the waste of slowdown; Implement a reasonable reward and punishment system; Strengthen technical education and training; Strengthen labor discipline, reduce unproductive and auxiliary employment, and strictly control the proportion of unproductive personnel.

② Material cost control. Mainly to improve the procurement, transportation, sending and receiving, storage and other links of www.bfblw.com and paper net, reduce the loss of each link and save the procurement cost; Reasonable stacking of site materials to avoid and reduce secondary handling; Strict material approach acceptance and quota acquisition system; Formulate and implement technical measures for saving materials, rationally using materials and comprehensively utilizing various resources.

③ Mechanical cost control. Mainly is the correct selection and rational use of machinery and equipment, do a good job in the maintenance of machinery and equipment, improve the intact rate, utilization rate and utilization rate of machinery, so as to speed up the construction progress, increase production and reduce machinery use fees.

④ Control of indirect expenses and other direct expenses. Indirect expenses refer to all expenses incurred by the project manager and various functional departments of the enterprise on the construction project. This part of the cost for different projects, the actual cost is different. If the scale of the project is different, the number of managers on the construction project is also different, and the salary, bonus and employee welfare expenses of managers are also different. Therefore, it is necessary to reasonably determine the management organization and management level to save the construction management cost. Other direct costs include temporary facilities fees, production tools use fees, inspection and test fees, engineering positioning retest fees, engineering site fees, site cleaning fees, etc. These costs are as different as indirect costs.

3.3 Cost control of organizational measures involves the economic optimization of the project cost control system of each department or even each power equipment in the construction of engineering projects. It is the most basic method for a staff member to strengthen the consciousness of "cost" and coordinate all departments to participate in cost control. The project management department and the team should be carefully organized, conscientious, open source and reduce expenditure. Technical measures, economic measures and organizational measures of project cost control are combined and interacted with each other. With the project management department as the cost control center and the bidding quotation as the basis, the project cost control objectives are formulated, and all departments and teams strengthen cooperation.