Test limits are born in an R&D lab on the best equipment, against hand-built prototypes, by engineers who know the circuit better than anyone — and none of that translates directly to a production floor.

In this Circuit Check whitepaper, we trace what actually happens to a test limit across its lifecycle:

• Why R&D bench limits were never designed for production

• How the production environment — shared instruments, aging fixtures, assembly variation, operator differences — systematically defeats limits that looked fine on paper

• What failure looks like when limits break down, and why waivers make it worse

• How a structured, data-driven review process closes the gap

The paper closes with a practical comparison table: R&D limit practices vs. what production limit management should actually look like.

If you've ever inherited a test program and wondered why the false failure rate was 3% on day one, this paper is for you.