How to determine the correct setting for FitValidationSensitivity for a forecast profile?

Summary:

As per the oracle documentation

"FitValidationSensitivity : Controls the sensitivity of fit validation. Forecasting methods with a mean absolute percentage error (MAPE) greater than the specified value are rejected. The smaller the value, the stricter is the validation. For loose validation, use values between 1 and 2. For strict validation, use values between .3 and .5.

This forecasting parameter may be the most important one for your forecast. If your forecast is failing at the required level, increasing the value of this forecasting parameter might help."

In trying to determine the correct setting for FitValidationSensitivity for a forecast profile what should be considered?

Kindly advise.