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| Kontrollkort – Statistisk processövervakning med Shewhart-diagram× | Experimentdesign× | |
|---|---|---|
| Ämnesområde | Försöksplanering | Försöksplanering |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1924 (first use); 1931 (seminal book) | 1935 |
| Upphovsperson≠ | Walter A. Shewhart (Bell Labs) | Ronald A. Fisher |
| Typ≠ | Statistical monitoring and control technique | Experimental planning framework |
| Ursprungskälla≠ | Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand. link ↗ | Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd. link ↗ |
| Alias | Shewhart chart, process-behavior chart, SPC chart, quality control chart | DOE, experimental design, factorial experimentation, planned experimentation |
| Närliggande≠ | 6 | 3 |
| Sammanfattning≠ | A control chart is a time-series graph with statistically derived upper and lower control limits that separates the natural, random variation of a process (common cause) from unusual, assignable variation (special cause). Invented by Walter Shewhart at Bell Labs in 1924, control charts remain the foundational tool of Statistical Process Control and are used across manufacturing, healthcare, software, and service industries to monitor whether a process remains stable and predictable over time. | Design of Experiments (DOE) is a systematic framework for planning, conducting, and analyzing controlled experiments to determine how multiple input factors simultaneously affect one or more responses. Introduced by Ronald A. Fisher in 1935, DOE allows researchers and engineers to identify causal relationships, quantify factor effects, and find optimal settings efficiently — using far fewer runs than one-factor-at-a-time approaches. It is foundational in engineering, manufacturing, agriculture, and applied sciences. |
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