Research Article
Nonparametric Confidence Limits of Quantile-Based Process Capability Indices
Table 1
Point estimates and 95% asymptotic lower confidence limits of various
.
| | Sample quantile | Interpolation-based qauntile | | Process | PCI Type | LCL | | s.e. | LCL | | s.e. |
| | | 0.911466 | 0.960000 | 0.02476212 | 0.918986 | 0.967761 | 0.02488492 | Before | | 0.846163 | 0.920000 | 0.03767177 | 0.849286 | 0.927437 | 0.03987269 | Adjust. | | 0.902110 | 0.953162 | 0.02604660 | 0.907308 | 0.960756 | 0.02726949 | | | 0.824969 | 0.913447 | 0.04514164 | 0.827334 | 0.920725 | 0.04764796 |
| | | 1.104678 | 1.142857 | 0.01947940 | 1.056493 | 1.142857 | 0.04406315 | After | | 1.038113 | 1.095238 | 0.02914537 | 0.997961 | 1.095238 | 0.04963102 | Adjust. | | 1.088776 | 1.131371 | 0.02173196 | 1.043063 | 1.131371 | 0.04505517 | | | 1.011710 | 1.084230 | 0.03700042 | 0.977467 | 1.084230 | 0.05447085 |
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