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| Robust Control Chart× | Prosessikykyanalyysi (Cp, Cpk)× | |
|---|---|---|
| Tieteenala≠ | Koesuunnittelu | Tilastotiede |
| Menetelmäperhe | Process / pipeline | Process / pipeline |
| Syntyvuosi≠ | 1989–1997 (foundational period) | 1986 |
| Kehittäjä≠ | David M. Rocke; L. G. Tatum (key contributors) | Victor Kane |
| Tyyppi≠ | Statistical process monitoring technique | Quantitative process evaluation index |
| Alkuperäislähde≠ | Tatum, L. G. (1997). Robust estimation of the process standard deviation for control charts. Technometrics, 39(2), 127–141. DOI ↗ | Kane, V. E. (1986). Process capability indices. Journal of Quality Technology, 18(1), 41–52. DOI ↗ |
| Rinnakkaisnimet | robust Shewhart chart, outlier-resistant control chart, robust SPC chart, distribution-free control chart | Process Capability Indices, Capability Study, Süreç Yeterlilik Analizi, Process Performance Analysis |
| Liittyvät≠ | 6 | 2 |
| Tiivistelmä≠ | A robust control chart replaces the classical mean and standard deviation estimators in a Shewhart-style chart with resistant alternatives — such as the median and median absolute deviation (MAD) — so that a small fraction of outliers or non-normal process data cannot distort the control limits. The approach preserves the real-time monitoring logic of standard control charts while protecting against inflated or deflated limits caused by contaminated Phase I reference data. | Process Capability Analysis quantifies how well a manufacturing or business process produces output within specified tolerance limits. Introduced formally by Victor Kane in 1986, it summarises process spread and centering into dimensionless indices — most notably Cp and Cpk — allowing engineers and quality managers to judge whether a stable process is inherently capable of meeting customer or design specifications consistently. |
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