It depends on the nature of the job. If you are in a consulting company, you generally don't go to the construction site. If you budget the project yourself, you will be at the construction site every day. But if you want to master the project cost, it is very necessary to stay at the construction site for one year. Otherwise, we don't know the construction process and how to do the project cost well.

According to the national standard "Terminology Standard of Project Cost" (GB/T50875-20 13) issued by the Ministry of Housing and Urban-Rural Development, the project cost (PC) refers to the construction cost that constitutes the estimated or actual expenditure of the project during the construction period.

The process of forecasting, planning, controlling, accounting, analyzing and evaluating the project cost by comprehensively applying the knowledge and skills of management, economics and engineering technology is called project cost management (PCM).

According to the procedures, methods and basis stipulated by laws, regulations and standards, the project cost and its components are predicted or determined, which is called project valuation or estimation (CPE).

The basis of engineering cost estimation (BEPC) includes engineering measurement and valuation standards, engineering valuation quota and engineering cost information related to valuation contents, valuation methods and price standards.