What is the relationship between project engineering management and EPC?

It should be “project management” in engineering. The so-called \"project management\" is defined internationally as \"a unique set of coordinated activities, with definite starting and ending points, undertaken by an individual or organization to achieve specific objectives within defined schedule, cost, and performance parameters.\" In China, it is described as \"four controls, two managements, and one coordination\" (the four controls being schedule control, quality control, cost control, and HSE control; the two managements being contract management and risk management; and the one coordination being organizational coordination). Project management is present throughout the entire project construction process and covers nine areas, including: comprehensive management, scope management, time management, cost management, quality management, human resource management, information communication management, risk management, and procurement management. It exists at all levels and among all parties involved in the construction of engineering projects, including: **functional departments, project owners, EPC contractors, design firms, suppliers, supervision agencies, and construction subcontractors. Therefore, the project management in an EPC turnkey project is only limited to the project management within its scope of work, and it cannot replace the project management carried out by other parties.

EPC is merely one mode of operation for project management. Project management is a broader concept, larger than that of EPC; EPC is just one way of contracting out projects, and there are many other methods as well. However, project management knowledge is applicable to any mode of project operation.

Thank you all; I finally understand a bit more now

In simple terms, EPC means you have the authority to make purchasing decisions; it includes both labor and materials