The validation parameters are set under "Extras" à "Model Options" in the tab "Validation".
First, the desired Validation Method must be set. If you have decided for a validation as per VDI 2048, then by activating the checkbox "Consider material table uncertainties", you can decide, whether the validation should use the uncertainties of the material tables in the form stored in the program, or whether the table uncertainties are to be entered for each measurement value.
The remaining parameters can be left unchanged. Details are described in the chapter "Model Options Validation".