DFT / ATPG · All levels
DFT Metrics Reference
Core metrics for DFT release and production stability.
Core metric families
Quality: fault coverage, defect-level proxies, escapes.
Cost: pattern count, tester memory, test time.
Robustness: shift/capture timing margin, test IR/thermal headroom.
Debug: diagnosis resolution, replay reproducibility.
Execution: closure iterations, unresolved waivers, owner latency.
diagram
METRIC GRAPH - coverage / pattern count / test-power margin
quality metric
^
| target
| - - - - - - -
| o after fix + regression
| o
| o baseline
| o regressed run
+--------------------------------------> closure iteration
input audit focused fix signoff review
Readout:
- explain what moved, why it moved, and who approved it