Ppk
Quality
Ppk
Process Performance Index Ppk
Long-term performance index considering overall process variation and centering relative to specification limits.
Examples
- 01After six months of production, the Ppk of the press-fit force is 1.21, below the customer's 1.33 target.
- 02Every quarter, the supplier's Ppk values for all 14 key characteristics are compared, and any value below 1.33 needs an action plan.
- 03When Ppk shows the process off-centre, the team adjusts the setting to bring the average back to nominal.