পদ্ধতির তুলনা করুন

	ঝুঁকি-ভিত্তিক নিয়ন্ত্রণ চার্ট	কন্ট্রোল চার্ট
ক্ষেত্র	পরীক্ষামূলক নকশা	পরীক্ষামূলক নকশা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1956 (economic design); refined through 1980s–2000s	1924 (first use); 1931 (seminal book)
প্রবর্তক	A. J. Duncan (economic design, 1956); T. J. Lorenzen & L. C. Vance (unified economic model, 1986)	Walter A. Shewhart (Bell Labs)
ধরন	Quantitative process monitoring method	Statistical monitoring and control technique
মৌলিক উৎস	Lorenzen, T. J., & Vance, L. C. (1986). The economic design of control charts: A unified approach. Technometrics, 28(1), 3–10.	Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand.
অপর নাম	economic control chart, risk-integrated SPC, cost-based control chart, economic design of control charts	Shewhart chart, process-behavior chart, SPC chart, quality control chart
সম্পর্কিত	6	6
সারসংক্ষেপ	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.	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.