The Statistics tab of the Run Preferences dialog determines how Crystal Ball displays percentiles. Settings on this tab also activate capability metrics to support Six Sigma and other quality programs. For general instructions, see Setting Run Preferences.
The Statistics tab of the Run Preferences dialog has these settings:
Calculate Percentiles As settings — Determine how Crystal Ball defines percentiles. Selecting either of these options also affects the percentiles used for the assumption alternate parameters.
Probability Below A Value — Defines percentiles as the percent chance (probability) that the associated variable value is at or below a particular value. This setting is the default.
Probability Above A Value — Defines percentiles as the percent chance (probability) that the associated variable value is at or above a particular value.
Format Percentiles As settings — Determine how Crystal Ball displays percentiles in charts and reports, with a percent sign or the percentile preceded by P.
Calculate Capability Metrics — Activates the process capability features in Crystal Ball; when selected Crystal Ball displays capability metrics indicating process quality, provided at least an upper or lower specification limit is entered in the Define Forecast dialog (Using the Process Capability Features).
Options button — When Calculate Capability Metrics is selected, displays the Capability Options panel for specifying short-term or long-term capability metrics formulas, a Z-score shift value, and other capability metrics calculation settings (Setting Capability Calculation Options).