METRIC -> MECHANISM -> EVIDENCE -> OWNER -> FIX -> REGRESSION
Scan: insertion legality, chain balance, clocking
Compression: ratio, X-handling, diagnosis resolution
ATPG: fault model, constraints, pattern quality
BIST/JTAG: reachability, compliance, security
Signoff: test timing + test power + quality + release checklistWhat metric is still at risk and in what context?
Which assumption is weakest (model, constraints, physical, tester)?
Which artifact proves confidence?
Who owns unresolved risk?
What regression matrix was run and passed?