Enter/Edit Specification Limits

Click the Process specs button on either the Process Capability Analysis Setup Raw Data - Raw data tab or Grouping tab, or the Process Capability Analysis Setup Aggregated Data - Quick tab or Advanced tab to display the Enter/edit specification limits dialog.

Following is a list of the different ways in which to enter values into this dialog:

  1. Enter the nominal target specification, and the lower and upper specification limits (specification range) to be used in the computation of the capability (such as Cpk) and performance (such as Ppk) indices.
  2. You can enter values only in the Nominal and Delta fields to specify the nominal target specification and the ± deviation (Delta) defining the specification range.
  3. You can also enter values in the Nominal, LSL, and USL fields to specify the lower specification limit (LSL), nominal target specification, and the upper specification limit (USL). In this way, you can thus define a specification range that is asymmetrical about the design center (nominal target).
  4. Finally, you can enter values in the Nominal and LSL fields or the Nominal and USL fields to specify one-sided specification limits.

OK

Click the OK button to accept the values entered in the Enter/edit specification limits dialog and return to the Process Capability Analysis Setup dialog to continue with analysis specifications.

Cancel

Click the Cancel button to return to the Process Capability Analysis Setup dialog. Any values entered in the Enter/edit specification limits dialog will be ignored.

See also General User Entry Spreadsheet.