automatic forecast model selection in DP

[Former Member]

Hello Gurus,

We would like to use the automatic forecast selection now, and wewould like to have either the automatic model section 1 with str 50 or the automatic model selection 2 with str 56.

can any one explain me what is the difference betwee automatic model selection 1 with forecast strategy 50 and automatic model selection 2 with forecast strategy 56.

what is the exact different between the above two?

[Former Member]

Hi,

Automatic model selection procedure 1 is used in forecast strategies 50, 51, 52, 53, 54 and 55.

Automatic Model selection procedure 2 is used in forecast strategy 56.

Procedure 1 executes Seasonal and Trend tests and if neitehr of these are postive then constant model is checked. For Procedure 1 , is to recommended to be used without outlier control.

Procedure 2 executes using Constant, trend, seasonal and seasonal trend model. For procedure 2, we must remember that when you use the outlier correction, the results are not comparable with the results of the individual processes, since another procedure can be selected for the outlier correction than for the final forecast.

Linear regression and seasonal linear regression are added to automatic model selection 2 . In addition , a trend test, a seasonal test and a test of white nosie are introduced in model selection 2.

*Further the way series of tests are carried out is different for the two procedures and this is explained in SAP Help .

*http://help.sap.com/saphelp_scm70/helpdata/en/19/98ad1765354d7ba54b1eb164c377e0/frameset.htm

Hope this gives you insight.

Regards

Datta