Compute %GRR = GRR/Tolerance × 100% from measurement system error and tolerance band width; generally <10% is excellent and >30% requires improvement.
输入测量系统误差 GRR 与公差带,求 %GRR。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| %GRR criteria | <10 / 10-30 / >30% | AIAG MSA 4th |
| Number of distinct categories | ndc ≥ 5 | AIAG MSA 4th |
| Tolerance basis | Tol or 6σ basis | AIAG MSA 4th |