Vertaile menetelmiä

	Risk-based Control Chart	Six Sigma DMAIC
Tieteenala	Koesuunnittelu	Laadunhallinta
Menetelmäperhe	Process / pipeline	Process / pipeline
Syntyvuosi	1956 (economic design); refined through 1980s–2000s	2014
Kehittäjä	A. J. Duncan (economic design, 1956); T. J. Lorenzen & L. C. Vance (unified economic model, 1986)	Motorola; Pyzdek & Keller
Tyyppi	Quantitative process monitoring method	Structured process improvement methodology
Alkuperäislähde	Lorenzen, T. J., & Vance, L. C. (1986). The economic design of control charts: A unified approach. Technometrics, 28(1), 3–10.	Pyzdek, T., & Keller, P. (2014). The Six Sigma Handbook (4th ed.). McGraw-Hill. ISBN: 978-0-07-184053-9
Rinnakkaisnimet	economic control chart, risk-integrated SPC, cost-based control chart, economic design of control charts	DMAIC Framework, Six Sigma Process Improvement Cycle, Define-Measure-Analyze-Improve-Control, Altı Sigma DMAIC
Liittyvät	6	3
Tiivistelmä	A risk-based control chart extends the classical Shewhart control chart by explicitly incorporating the costs and probabilities of two error types — false alarms (Type I) and missed shifts (Type II) — along with sampling costs, into the design of chart parameters. Rather than using arbitrary 3-sigma limits, the method selects sample size, sampling interval, and control limits to minimise the total expected cost or risk of operating the monitoring scheme.	Six Sigma DMAIC is a data-driven, five-phase process improvement methodology — Define, Measure, Analyze, Improve, and Control — used to reduce defects and process variation to fewer than 3.4 defects per million opportunities. Originating at Motorola in the 1980s and systematized by practitioners including Pyzdek and Keller, it is widely adopted in manufacturing, healthcare, finance, and service industries seeking sustained quality gains.