When a design fails in some scenarios and passes in others, the pattern of failures is evidence. This topic gives a repeatable method: translate symptoms into the attribute that explains them, triage endpoints by the set of views they fail in, bisect the difference between two runs, and summarise results without counting the same endpoint several times.
Lesson | After it you can... |
|---|---|
Infer the explaining attribute from failing scenarios. | |
Group endpoints by the views they fail in. | |
Find the one change that explains a difference between runs. | |
Report WNS, TNS and violation counts honestly. |
A failure that appears only where one attribute (mode, process corner, interconnect corner) is shared points at that attribute as the cause.