How To Fix PR419 - La procédure de sélection de modèle 2 a été sélectionnée.

SAP Error Message - Details

• Message type: E = Error

• Message class: PR - Forecast: Help messages

• Message number: 419

• Message text: La procédure de sélection de modèle 2 a été sélectionnée.

Diagnosis
There are two automatic model selection procedures:
Procedure 1
The system carries out statistical tests and checks whether a trend or
a seasonal requirements pattern applies.
In the trend test, the system subjects the historical values to a
regression analysis and checks to see whether there is a significant
trend pattern.
In the seasonal test, the system clears the historical values of any
possible trends and carries out an autocorrelation test.

Le système émet un message d'erreur et ne vous permettra pas de poursuivre cette transaction tant que l'erreur n'est pas résolue.

Procedure 2
The system calculates the models to be tested using various
combinations for alpha, beta, and gamma. The smoothing factors are also
varied between 0.2 to 0.8 in intervals of 0.2.
The system then chooses the model which displays the lowest mean
absolute deviation (MAD).
Procedure 2 is more precise than procedure 1 but takes much longer.
System response
Procedure 1 is always used in Flexible Planning. Both procedure 1 and
procedure 2 are possible when you run the forecast in material
requirements planning.
What to do
If you use the forecast in material requirements planning, you set the
selection procedure in the material master record.

Extrait du message d'erreur du système SAP. Copyright SAP SE.