手法を比較

	ベイズ管理図	プロセス能力解析 (Cp, Cpk)
分野	実験計画法	統計学
系統	Process / pipeline	Process / pipeline
提唱年	Formally developed in the 1990s–2000s; roots in Shewhart (1924)	1986
提唱者	Ulrich Menzefricke and others building on Shewhart (1924) and Bayesian inference (Bayes, 1763)	Victor Kane
種類	Statistical process monitoring / quality control	Quantitative process evaluation index
原典	Menzefricke, U. (2002). On the evaluation of control chart limits based on predictive distributions. Communications in Statistics — Theory and Methods, 31(8), 1423–1440.	Kane, V. E. (1986). Process capability indices. Journal of Quality Technology, 18(1), 41–52.
別名	Bayesian SPC chart, Bayesian monitoring chart, posterior control chart, Bayesian Shewhart chart	Process Capability Indices, Capability Study, Süreç Yeterlilik Analizi, Process Performance Analysis
関連	6	2
概要	A Bayesian control chart integrates prior knowledge about a process — such as historical mean and variance — with incoming measurement data to produce dynamically updated control limits. Unlike classical Shewhart charts that fix limits from a Phase-I baseline, Bayesian charts update the posterior distribution of process parameters after each sample, yielding limits that adapt to accumulated evidence and are better calibrated under small sample sizes or non-stationary processes.	Process Capability Analysis quantifies how well a manufacturing or business process produces output within specified tolerance limits. Introduced formally by Victor Kane in 1986, it summarises process spread and centering into dimensionless indices — most notably Cp and Cpk — allowing engineers and quality managers to judge whether a stable process is inherently capable of meeting customer or design specifications consistently.