XIII. Lot Traceability
The Company’s understanding of the Supplier’s Lot Control is important to ensuring the traceability of supplied parts through the Company’s manufacturing processes. In the event that a defect does occur, the Company expects the supplier to be able to provide relevant manufacturing and raw material information through the use of lot control.
The Company requires that an LNDD (Lot Number Display Detail) be filled out and returned to the Company’s APQP Department with the PPAP submission. The LNDD will include the following information:
- Part number, Part name, Supplier Name.
- Structure of Lot Number- What do the numbers or letters in the lot number mean.
- Lot Number Identification Method – on the label and if applicable, on the part. The lot number must be bar coded on the label. This is the number the Company will record for traceability.
- The Method will be shown in the “Illustration of Parts Lot Control” section. Indicate what the sizes (quantities) of the lots are in this area.
- Illustration of Parts Lot Control- Use this section to explain your traceability system. Pictures of the label that will be on the outside of the box will be located in this area.
- The LNDD must be signed off by the supplier and submitted to the Company’s APQP Department.
- The Company will approve/reject the LNDD and notify the supplier.
The production lot sizes must be kept to a reasonable quantity and the data able to be retrieved within a logical time. The Company’s request that the data be retrieved in a 2 hour period but requires this information to be provided within 24 hours from the call of a problem.
This requirement is an effort to protect the Company and the supplier from large market expenses if a part problem arises. The Company’s understanding of the Supplier’s LNDD ensures better recording and traceability within SRK’s processes, and better investigation for problems as they arise. Accurate and detailed record keeping is essential to the success of a lot control system.