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	Flerdimensionell statistisk processtyrning	Kontrollkort – Statistisk processövervakning med Shewhart-diagram
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1947 (Hotelling's T²); mature multivariate SPC framework 1980s–2000s	1924 (first use); 1931 (seminal book)
Upphovsperson	Harold Hotelling (T² statistic); extended by Alt, Lowry, Montgomery, Mason & Young	Walter A. Shewhart (Bell Labs)
Typ	Multivariate quality-monitoring procedure	Statistical monitoring and control technique
Ursprungskälla	Lowry, C. A., & Montgomery, D. C. (1995). A review of multivariate control charts. IIE Transactions, 27(6), 800–810.	Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand.
Alias	Multivariate SPC, MSPC, Multi-response SPC, Multivariate statistical process control	Shewhart chart, process-behavior chart, SPC chart, quality control chart
Närliggande	6	6
Sammanfattning	Multi-response statistical process control (multivariate SPC) extends classical univariate control charting to processes where two or more correlated quality characteristics must be monitored simultaneously. By treating all responses as a joint distribution, it detects shifts that would be invisible when each response is charted independently, reducing false alarms and improving the sensitivity of process monitoring in manufacturing and service contexts.	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.