Process quality control points

Grade A: Quality control points that affect the safe operation of the device (product) and its functional performance, result in quality issues after it is put into use and require shutdown to be resolved, or for which special requirements are stipulated in the contract agreement； Grade B: Quality control points that affect the quality of the subsequent process ； Class C: Minor quality control points that have little impact on the quality of the project, or issues arising after operation can be addressed at any time. Where record-keeping is required at quality control points at various levels, an R should be added, such as AR, BR, CR. Level A (or AR) should be inspected jointly by the project owner, the supervision unit, the general contractor, and the construction unit ； Grade B (or BR) shall be jointly inspected by the supervision unit, the general contractor, and the construction unit ； Grade C (or CR) shall be inspected by the construction unit. Joint inspections for each grade shall be carried out after the construction unit has completed its own inspections and found them to be satisfactory. When there is no general contractor at the construction site, the inspection of control points of grade A (or AR) and B (or BR) shall be carried out jointly by the project owner, the supervision unit, and the construction unit.