Use these drills after completing all topics in DFT Physical Integration. Answer with metric, mechanism, evidence, owner, and regression plan.
[INT][DFT][DFT-PHYSICAL-INTEGRATION]
Q: What is the most expensive late DFT physical mistake?
A:
Poor chain order/floorplan assumptions that require large-scale reroute and hold repair near signoff.
FOLLOW-UP TRAP: Treating chain ordering as a post-route cleanup item.[INT][DFT][DFT-PHYSICAL-INTEGRATION]
Q: How do you reduce DFT-PD churn?
A:
Versioned handoff contracts for chain rules, test clocks, placement legality, and ownership.
FOLLOW-UP TRAP: Relying on verbal agreements only.METRIC -> MECHANISM -> EVIDENCE -> FIX -> REGRESSIONPHYSICAL DFT FLOW
chain planning -> floorplan placement -> route -> test timing/power validationState metric, lot/corner context, and pattern tag with every claim.
Treat timing, power, and quality as one signoff problem.
Chasing coverage without legality checks.
Ignoring test-power side effects of pattern changes.
Debugging silicon without reproducible tags.