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| CUSUM ellenőrző kártya× | Statisztikai folyamatszabályozás× | |
|---|---|---|
| Tudományterület≠ | Statisztika | Kísérlettervezés |
| Módszercsalád | Process / pipeline | Process / pipeline |
| Keletkezés éve≠ | 1954 | 1924–1931 |
| Megalkotó≠ | E. S. Page | Walter A. Shewhart |
| Típus≠ | Statistical process control chart for small shifts | Process monitoring and quality control method |
| Alapmű≠ | Page, E. S. (1954). Continuous inspection schemes. Biometrika, 41(1/2), 100–115. DOI ↗ | Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand. ISBN: 978-0873890762 |
| Alternatív nevek | cumulative sum chart, CUSUM control chart, Page's CUSUM, kümülatif toplam kontrol kartı | SPC, statistical quality control, process control charting, Shewhart control |
| Kapcsolódó≠ | 4 | 6 |
| Összefoglaló≠ | The cumulative sum (CUSUM) control chart, introduced by E. S. Page in 1954, monitors a process by accumulating the deviations of observations from a target value rather than judging each point in isolation. Because small persistent shifts add up over time, the running sum makes them visible far sooner than a Shewhart chart, making CUSUM the tool of choice for detecting small, sustained changes in the process mean. | Statistical Process Control (SPC) is a data-driven quality method that uses statistical techniques — primarily control charts — to monitor a manufacturing or service process over time. By distinguishing natural process variation (common cause) from unusual, actionable variation (special cause), SPC enables practitioners to maintain processes in a stable, predictable state and to detect problems early, before defective output reaches customers. |
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