How do you verify a supplier's specifications before placing an order?
You verify a supplier's specifications by freezing the exact agreed spec into the contract (a spec snapshot), binding it to a deterministic signature so it cannot be altered after signing, and tying the quality milestone to a written acceptance standard (such as an AQL sampling level and a first-article inspection) that must be met before the largest payment tranche releases.
Spec disputes usually come from ambiguity: the buyer thought one thing, the supplier delivered another, and there is no frozen record of what was agreed. Verification starts by removing that ambiguity before anyone builds.
Freeze the spec, then bind it
On MPBxChange the agreed specification is captured as a frozen spec snapshot at signing and bound into a deterministic part-signature — a compact, reproducible identifier derived from the spec itself. Because the signature is derived from the spec, any later change to the terms produces a different signature, so tampering is visible. Neither party can quietly assert a different specification after the fact.
Tie payment to an acceptance standard
- ·Define the acceptance standard in the contract (for example a workmanship class, an AQL sampling level, a first-article report, and a certificate of analysis).
- ·Make the quality milestone release conditional on that standard being met and evidenced.
- ·Require first-article approval before series production for higher-risk parts.
The result is that "meets spec" is a documented, checkable event tied to money, not an opinion expressed after delivery.
Frequently asked questions
A frozen copy of the exact agreed specification captured at signing and bound to a deterministic signature, so the terms cannot be altered afterward without the change being visible.
Acceptable Quality Limit — a sampling standard (per ISO 2859-1) that defines how many defects in a sampled lot are tolerable before the lot is rejected, used as the objective basis for a quality milestone.