Collect once, use across reviews: LTSSM history, per-lane margin, AER counters, TLP trace for failing transaction, config space snapshot, firmware enumeration log.
Protocol analyzer at slot level — correlates with driver timeline.
Interpret AER severity/status using the selected revision, mask/configuration and platform recovery policy.
A high replay rate is link-layer evidence; correlate physical margin, clocks, reset/recovery events, configuration and observation interval before assigning SI.