Σύγκριση μεθόδων

	Διάγραμμα Ελέγχου Βάσει Κινδύνου	Στατιστικός Έλεγχος Διεργασιών
Πεδίο	Πειραματικός Σχεδιασμός	Πειραματικός Σχεδιασμός
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1956 (economic design); refined through 1980s–2000s	1924–1931
Δημιουργός	A. J. Duncan (economic design, 1956); T. J. Lorenzen & L. C. Vance (unified economic model, 1986)	Walter A. Shewhart
Τύπος	Quantitative process monitoring method	Process monitoring and quality control method
Θεμελιώδης πηγή	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. ISBN: 978-0873890762
Εναλλακτικές ονομασίες	economic control chart, risk-integrated SPC, cost-based control chart, economic design of control charts	SPC, statistical quality control, process control charting, Shewhart control
Συναφείς	6	6
Σύνοψη	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.	Statistical Process Control (SPC) is a data-driven quality method that uses statistical techniques — primarily control charts — to monitor a manufacturing or service process over time. By distinguishing natural process variation (common cause) from unusual, actionable variation (special cause), SPC enables practitioners to maintain processes in a stable, predictable state and to detect problems early, before defective output reaches customers.