1. When developing point B suppliers, the purchasing department shall first check whether the drawing version is up-to-date, and confirm whether the key dimensions of parts are marked on the drawings, and whether the parts can be tested and qualified according to the dimensions marked on the drawings;<br>2. The purchasing department is required to improve the self inspection standard of suppliers;<br>3. For parts with color requirements, the purchasing department shall check whether the drawing requirements are consistent with the color plate when receiving the drawings and color plates;<br>4. When receiving technical drawings, the purchasing department of drawings with tolerance range shall verify whether the tolerance dimensions indicated on the drawings are reasonable, and organize suppliers to carry out limit tolerance matching experiments on matched parts.
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