What is information system supervision? What's the role? What is "four controls, three tubes and one coordination"?

Information system supervision refers to the process that a unit registered in the administrative department for industry and commerce of the government with the qualification of information system supervision accepts the entrustment of the construction party and supervises and manages the whole process of information system construction and implementation according to relevant laws and regulations, industry technical standards and supervision contracts. The main function of information system supervision is: 1) to provide technical reference and consultation for the owners. 2) Supervise and manage the contractor's operation from a technical point of view. 3) Ensure project delivery quality and project management achievements. 4) coordinate all aspects of the relationship. 1) Four major controls: quality control, change control, investment control and schedule control. 2) Three management: information management, safety management and contract management. 3) Coordination: Coordinate the relationship among the owner, contractor, equipment and material suppliers. As far as engineering quality is concerned, information system supervision can have an impact on quality in the following aspects: 1) control cost. This mainly includes three aspects: first, review the system design and construction scheme kicked out by the contractor; Supervise the implementation process and form a cash flow statement; After the completion of the project implementation, the overall evaluation and analysis will be carried out. 2) Quality control after delivery. Ensure that the system meets the requirements as much as possible and meets the requirements of reliability, safety, ease of use and portability. 3) Record the whole construction process, which is well documented. 4) Supervise the quality of project management achievements.