Process capability index

The Process Capability Index (Cpk) is a statistical measure used to evaluate a manufacturing process's ability to produce items that meet specified tolerances or design limits. It assesses how well a process can produce output within the defined specifications and is important in quality control. Here's a breakdown of key concepts related to Cpk: 1. **Specification Limits**: These are the upper and lower limits defined for a process's desired output. For example, if a part must measure 10 mm ± 0.