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Project Management & Agile · Intermediate

Specification Limits

Customer- or engineering-defined boundaries (USL and LSL) for acceptable output.

Definition

Specification limits reflect requirements; control limits reflect process behavior. They are different and should not be confused.

Example

A bolt must be 10 mm plus or minus 0.1 mm.

Exam tip

Spec limits = voice of the customer; control limits = voice of the process.

Related terms