Process Capability Analysis
Reference model
Process capability is assessed using Cp, Cpk, Pp, and Ppk indices.
About this model
A statistical method used to determine the capability of a process to produce output within specified limits.
Originator not stated.
How to read it
- Focus on Cp and Cpk for short-term capability.
- Use Pp and Ppk for long-term performance assessment.
What this does
Evaluates how well a process can produce output within specified limits, helping to identify areas for improvement and ensuring quality standards are met.
When to use it
Use it when you need to assess the performance of a process against its specifications and identify opportunities for enhancement.
Not when: Do not use it when the process is not stable or when data is insufficient to provide a reliable analysis.
What happens next
Consider a control chart to monitor ongoing process performance.
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Drafted with AI and reviewed by Eccellere on 04/11/2026. Guidance, not advice: apply your own judgement.