Capability Ratios for True Position - Specification Tab

  1. Select Capability ratios for True Position from the Process Analysis Procedures Startup Panel - Quick tab.
  2. Click the OK button to display the Capability ratios for True Position dialog box, which contains one tab: Specification.

See also the Introductory Overview and Computational Details.

Variables

  1. Click the Variables button to display a standard 2-variable-lists selection dialog box.
  2. Specify an equal number of X and Y variables (for instance, the same amount of variables in each list).

Statistica will perform the computations (compute positional capability statistics) for each pair of X and Y variables, matching the first variable in the X list with the first variable in the Y list, the second variable in the X list with the second variable in the Y list, and so on.

Process specs

  1. Click this button to display a standard General User Entry Spreadsheet.
  2. Specify the Tolerance diameter, True position X/Y locations, and (optionally) lower and upper specification limits (LSL/USL) for each X and Y variable.

If individual specification limits (for X and Y) are not specified by the user, then default LSL/USL limits are computed as:

True Position +/- Positional Tolerance * sin(45)

where sin(45) = .70711, and

Positional Tolerance = (Tolerance diameter)/2

OK

Click the OK button to display the Capability ratios for True Position Results dialog box.

Cancel

Click the Cancel button to return to the Process Analysis Procedures Startup Panel.

Options

Click the Options button to display the Options menu.

Select Cases

Click the Select Cases button to display the Analysis/Graph Case Selection Conditions dialog box, which is used to create conditions for which cases will be included (or excluded) in the current analysis.

More information is available in the case selection conditions overview, syntax summary, and dialog description. Note that other options are provided in the subsequent dialogs to specifically identify observations that are to be used as a test sample (see the Overview for details).