The Psychology of Quality and More

A Toolbook for Quality Improvement and Problem Solving (contents)

Process Capability: When to use it

The Quality Toolbook > Process Capability > When to use it

When to use it | How to understand it | Example | How to do it | Practical variations

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When to use it

• Use it when setting up a process, to ensure it can meet its specification limits.
• Use it when setting specification limits, to ensure they are neither too wide nor too narrow.
• Use it when investigating a process that is not meeting its specification limits.
• Use it only when the process is stable and has a Normal distribution.

Fig. 1. Using Process Capability in problem solving

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