You can specify the target values and specification limits for each measure
of a particular process for a particular product.
Go to the Components page and select a product. Then
select the process flow step of your product.
Open the process step and go to the
Process Summary
section to access the target and specification limits.
Enter values for the target, specification limits, and action limits for each measure.
Target
Indicates the setpoint of the process or product measurement. Often,
the target is centered between the control limits (for an in-control
process) or specification limits. You must enter a target value to
calculate Cpm, a capability index that also considers how much the
data deviate from the target.
Lower specification limit (LSL) and Upper specification limit (USL)
Indicate the minimum or maximum acceptable value for the product or
service. To perform a capability analysis, you must enter a lower
specification limit, an upper specification limit, or both.
Lower action limit (LAL) and Upper action limit (UAL)
Optional values that indicate an early warning sign to take action
on the process. Usually, the LAL is greater than the LSL, and the
UAL is less than the USL.
Select
Additional Settings
to enter reasonable limits and absolute limits for each measure.
Reasonable lower limit (RLL)
and
Reasonable upper limit (RUL)
Indicate values that identify unlikely measurements. Reasonable
limits are used to flag data entry errors.
Absolute lower limit (ALL)
and
Absolute upper limit (AUL)
Indicate values that identify impossible or extremely unlikely
measurements. Absolute limits are used to prevent data entry errors. Reasonable
lower limits must be greater than absolute lower limits, and reasonable upper
limits must be less than absolute upper limits.
