A variation setup has many moving parts: the method, the derates, the margins, the endpoints near zero slack. Closure takes weeks, and decisions rest on comparing one run with another. This topic defines the few numbers worth tracking, shows how margin changes can disguise or exaggerate progress, how to compare runs on common endpoints, and what a signoff package must contain.
Lesson | After it you can... |
|---|---|
Choose the metrics, including a near-critical histogram. | |
Normalise slack for margin changes. | |
Compare on common endpoints. | |
Check a package for completeness. |
It reflects one endpoint in one scenario and says nothing about how many endpoints are close behind it, what margins were applied, or whether the endpoint set changed.