| Year | No. of samples | SRR | Not meeting TAT | |||||
| Variance (%) | DPMO | Sigma level | Variance (%) | DPMO | Sigma level | |||
| 2011 | 2194 | 12 (0.55) | 5469 | 4.04 | 45 (2.05) | 20,510 | 3.54 | |
| 2012 | 2715 | 5 (0.18) | 1842 | 4.40 | 20 (0.74 ) | 7366 | 3.94 | |
| 2013 | 3011 | 5 (0.16) | 1161 | 4.44 | 16 (0.53) | 5314 | 4.05 | |
| Total | 7920 | 22 (0.28) | 2778 | 4.27 | 81 (1.02) | 10,227 | 3.82 | |