مقایسهٔ روشها
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| نمودار کنترل مبتنی بر ریسک× | تحلیل قابلیت فرآیند (Cp, Cpk)× | |
|---|---|---|
| حوزه≠ | طراحی آزمایش | آمار |
| خانواده | Process / pipeline | Process / pipeline |
| سال پیدایش≠ | 1956 (economic design); refined through 1980s–2000s | 1986 |
| پدیدآور≠ | A. J. Duncan (economic design, 1956); T. J. Lorenzen & L. C. Vance (unified economic model, 1986) | Victor Kane |
| نوع≠ | Quantitative process monitoring method | Quantitative process evaluation index |
| منبع بنیادین≠ | Lorenzen, T. J., & Vance, L. C. (1986). The economic design of control charts: A unified approach. Technometrics, 28(1), 3–10. DOI ↗ | Kane, V. E. (1986). Process capability indices. Journal of Quality Technology, 18(1), 41–52. DOI ↗ |
| نامهای دیگر | economic control chart, risk-integrated SPC, cost-based control chart, economic design of control charts | Process Capability Indices, Capability Study, Süreç Yeterlilik Analizi, Process Performance Analysis |
| مرتبط≠ | 6 | 2 |
| خلاصه≠ | 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. | 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. |
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