Pp
Quality
Pp
Process Performance Index Pp
Long-term process performance index comparing specification width with overall process variation.
Examples
- 01Over three months, the bore diameter shows a Pp of 1.4, including variation from shifts, tools and material batches.
- 02The supplier presents Pp next to Cp, showing that long-term variation is much higher than short-term.
- 03A low Pp despite good Cp tells the team to look for differences between shifts or batches.