Specification Limit

Requirement boundary defined by customer, engineering or regulation; unlike a control limit it is not calculated from process data.

Examples

01The specification limit for the shaft diameter is 20.00 ± 0.02 mm, set by the design engineer based on the bearing fit.
02In the supplier review, the team checks that operators do not confuse specification limits with control limits on their charts.
03When a process is well within its control limits but close to a specification limit, the team centres the process instead of waiting for rejects.