The phrase is used loosely. It can mean the whole product, one stage of production, or only the shop that assembled it. This is a plain-language reference on what the term covers, what the labels signify, and how to check a claim rather than take it.
This page is being written openly and is incomplete. Where something is not yet verified, it says so rather than filling the gap. Corrections from people who work under these agreements are welcome and will be credited.