विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| संचयी योग नियंत्रण चार्ट (CUSUM Control Chart)× | शेवर्ट वेरिएबल्स कंट्रोल चार्ट (X-बार / R)× | |
|---|---|---|
| क्षेत्र | सांख्यिकी | सांख्यिकी |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1954 | 1931 |
| प्रवर्तक≠ | E. S. Page | Walter A. Shewhart |
| प्रकार≠ | Statistical process control chart for small shifts | Statistical process control chart for variables |
| मौलिक स्रोत≠ | 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. D. Van Nostrand Company. ISBN: 978-0-87389-076-2 |
| उपनाम≠ | cumulative sum chart, CUSUM control chart, Page's CUSUM, kümülatif toplam kontrol kartı | X-bar and R chart, Shewhart chart, variables control chart, process control chart |
| संबंधित | 4 | 4 |
| सारांश≠ | 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. | The Shewhart control chart, invented by Walter Shewhart at Bell Labs in the 1920s and set out in his 1931 book, is the foundational tool of statistical process control. It plots a process statistic — typically the subgroup mean (X-bar) and range (R) — over time against a center line and three-sigma control limits, distinguishing the natural common-cause variation inherent in a stable process from special-cause variation that signals something has changed and warrants investigation. |
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