Clear acceptance standards: Determine the acceptance standards, including requirements for quantity, quality, appearance, and other aspects.

Strict inspection of incoming materials: Conduct a strict inspection of each batch of incoming materials, such as appearance, size, weight, composition, etc., and record the inspection results.

Establish a supplier evaluation system: Establish a supplier evaluation system, regularly evaluate each supplier, and adjust the procurement plan based on the evaluation results.

Establish incoming inspection standards: Develop incoming inspection standards, inspect incoming materials according to the standards, and promptly handle or return non-conforming products to suppliers.

Establish incoming material control process: Establish an incoming material control process, clarify the responsible person and process, and ensure that quality issues in each link are effectively controlled.