手法を比較

	ベイズ統計的プロセス管理	管理図
分野	実験計画法	実験計画法
系統	Process / pipeline	Process / pipeline
提唱年	1950s (foundations); formalized 1990s–2000s	1924 (first use); 1931 (seminal book)
提唱者	Various (Girshick & Rubin 1952 early signal detection; Menzefricke 2002 Bayesian control chart framework)	Walter A. Shewhart (Bell Labs)
種類	Bayesian process monitoring technique	Statistical monitoring and control technique
原典	Menzefricke, U. (2002). On the evaluation of control chart factors for monitoring the process mean and variance. Journal of Quality Technology, 34(2), 167–178.	Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand.
別名	Bayesian SPC, Bayesian process monitoring, B-SPC, Bayesian control charting	Shewhart chart, process-behavior chart, SPC chart, quality control chart
関連	5	6
概要	Bayesian Statistical Process Control (Bayesian SPC) extends classical SPC by replacing fixed, frequentist control limits with a probabilistic framework that incorporates prior knowledge about the process. Rather than waiting for a run of points to exceed a pre-set 3-sigma boundary, Bayesian SPC continuously updates the probability that the process has shifted given the incoming data, enabling earlier and more informed detection of out-of-control states while formally accounting for uncertainty in process parameters.	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.