Cp
Quality
Cp
Process Capability Index Cp
Potential process capability index comparing specification width with six standard deviations, without considering centering.
Examples
- 01For a new press-fit diameter with a tolerance of 0.04 mm, the team calculates a Cp of 1.9, showing the spread fits well inside the tolerance.
- 02The supplier reports a good Cp but no Cpk, so the buyer asks for both because a narrow process can still be off-centre.
- 03When Cp drops from 1.8 to 1.1 after a machine move, the team checks spindle vibration before restarting full production.