Meaning
Comprehensive dimensional reports verify that the first parts produced from new tooling meet every design specification before mass production begins. An fai cmm layout involves a full measurement of every dimension and tolerance listed on the engineering drawing using coordinate measuring technology. It governs the approval of the manufacturing process and ensures that the tooling is capable of producing parts within the required limits.
This verification is specific to the initial batch and must be repeated if the mold or machine undergoes a significant repair.
Design Verification
Every feature on the drawing is assigned a number and measured against the nominal value and the tolerance. The resulting report lists the actual measurement, the deviation, and a pass or fail status for each point. This exhaustive check often covers hundreds of dimensions on a single complex part.
Production Validation
Under Chinese industrial practice, the completion of this report is a prerequisite for the release of the final payment for tooling. The buyer reviews the fai cmm layout to confirm that the supplier has correctly interpreted the technical requirements. mass production is forbidden until the buyer provides a signed approval of this document.
Archival Requirement
Records of these measurements are kept for the life of the product to provide a baseline for future quality audits. They serve as the definitive proof of what the tooling produced at the start of its service life.