Specification limits (LSL, USL)

voice of the customer

The lower and upper limits from the drawing or the customer requirement. Parts outside them are nonconforming. Capability indices compare the specification width with the process spread.

Calculate it

Process Capability & Control Charts: Cp, Cpk, Pp, Ppk, PPM and confidence intervals with X-bar/R, X-bar/S or I-MR charts and all 8 Nelson rules.

Related terms

• Control limits: voice of the process
• Cpk: process capability index