Cpk
Quality
Cpk
Process Capability Index Cpk
Process capability index considering both spread and centering relative to the nearest specification limit.
Examples
- 01The customer requires a Cpk of at least 1.33 for the bearing seat, and the first run shows 1.12 because the process sits close to the upper limit.
- 02In the supplier review, Cpk values for all key characteristics are compared with last quarter to see which processes are drifting.
- 03When Cpk on a seal groove falls below 1.0, the parts are 100 % inspected until the tool offset is corrected and capability is shown again.