Locking Parameters When Fitting Distributions

Some distributions can fit the data more accurately if you are able to enter and lock parameter values so the shape, location, or certain other parameters of a distribution better match the data. In most cases where you can fit data to distributions within Crystal Ball, you can also choose to lock parameters.

  To lock parameters:

  1. Select Lock parameters in a distribution fitting dialog box. For example, you can make that setting in the Fit Distribution dialog for assumptions.

    The Lock Parameters dialog opens.

  2. Select one of the available distributions and enter a value for one or more of its parameters.

  To edit parameter locking settings:

  1. In the Fit Distribution dialog, select Lock parameters, and then click Edit Parameters.

  2. Change settings in the Lock Parameters dialog, and then click OK.