Factory Production Control (ZKP) is a permanent internal production control carried out by 4INDUSTRY in accordance with the relevant harmonized technical specification of products, all elements, requirements and provisions of which (adopted by the manufacturer) should be systematically documented. The documentation system should ensure a uniform interpretation of the requirements to achieve the required product characteristics and demonstrate the effectiveness of the production control system. The subject of the Factory Production Control Certification program (FPC) is a description of the Product and Personal Polish Register of Ships S.A. the process of certification of factory production control (ZKP) systems, required by law in order to mark (by the manufacturer) its construction products with the CE mark.