Section 4

Process capability assessment is performed to assess how well a product characteristic will meet customer or engineering specifications. Highly capable processes are required in order to provide a consistent and reliable performance for our customers.

This section focuses on the methods used to assess process capability for key characteristics.

This section includes details on:

• Types of capability assessments
• Review of stability vs. capability
• Estimating ppm (parts per million defective)
• Defining and estimating capability indices (e.g. C_pk)
• Interpretation and limitations of capability indices
• Handling nonnormal data