Check the client's requirements and verify sourcing, packaging, shipping. Investigate supplier's reputation and evaluate their business and standards and procedures. Go to local vendor’s warehouse and conduct an on-site inspection regarding their inventory and management. Confirm the quantity of parts stated in original order, inspect the condition of the packaging. Verify the lot code and determine whether parts are from the same batch or bulk. Compare product to the manufacturer’s specifications, do visual inspections on markings and package dimensions Perform a marking permanency test of top marking and verify the authenticity of products. Inspect part leads for evidence of prior use, refurbishment, or oxidation.