Test Signoff Reports: Review Checklist

Review checklist

Review Checklist for Test Signoff Reports focuses on test readiness score, unresolved waivers, production release risk. The goal is to convert metric movement into mechanism, owner, and release decision.

• Run tags and scenario context are explicit.

• Constraints and legality assumptions are documented.

• Quality, timing, and test-power checks are included.

• Diagnosis evidence supports residual-risk decision.

• Owners signed: DFT lead, product engineering lead, program lead.

Signoff ownership

OWNERSHIP MAP - Test Signoff Reports

artifact              owner
----------------      -----------------
architecture/report DFT lead
constraints/setup   product engineering lead
physical/test       program lead

Name an owner for each failing metric cluster.

DFT deep dive

Test signoff fails when shift/capture timing and test power are treated independently.

Concept diagram

TEST SIGNOFF LOOP

test SDC -> shift/capture timing -> power-aware ATPG -> IR validation -> release

Metric graph

TEST CURRENT

functional current  baseline
scan shift current  peak-risk zone

Reports and artifacts

• test-mode STA report

• shift/capture split

• test power IR map

• waiver tracker

Mini case study

At-speed patterns passed timing but failed in production due to peak shift IR; staggered capture and power-aware fill resolved.

Debug branches

• Tag test and functional corners separately

• Check hold in shift mode

• Correlate fail bins with power hotspots

Senior review question

Ask: what evidence proves this DFT decision is safe for production?

Key takeaways

• State metric, lot/corner context, and pattern tag with every claim.

• Treat timing, power, and quality as one signoff problem.

Common pitfalls

• Chasing coverage without legality checks.

• Ignoring test-power side effects of pattern changes.

• Debugging silicon without reproducible tags.

Principal DFT review addendum

Test signoff consolidates coverage, timing, power, and diagnosis evidence into a release decision with explicit ownership and waivers.

Metric: test readiness score, unresolved waivers, production release risk