At the very beginning of the production process (not more than 5% produced), inspector inspects raw materials and components. It ensures the function and appearance of the components and raw materials are consistent and satisfactory to the requirements and specifications.
For PPI, the main checking points are as follows:
◎ Factory's production lines & capability
◎ Factory's facilities & equipment
◎ Raw materials, main components and accessories
◎ Semi-finished products
◎ Some finished products