Spec-compliant output, not prototype-grade variance.
Run-to-run QA is documented. Batch traceability is on every part. Tolerances are confirmed per batch with measurement on the bench, not a number on a quote. Production yield is held at the level named in the quote. Procurement-grade buyers have been burned by prototype vendors that could not hold ±0.2mm at volume. That is the credibility cliff we are built to stand on.

