Seasonal + Trend forecast calculation

[babarkhan_mujawar]

all,

We are using Consumption based planning with MRP type VV and Forecast model - X and material master maintained as below.

For testing purpose, I have maintained past consumption for last 6 month as below screen shots.

When I execute forecast from Material master tab, I got basic values, MAD, safety stock & error total as below..

How System is calculating above values?. I have gone through the formula but didn't understood and also gone through below link but didn't get sna idea.

http://http://scn.sap.com/community/erp/post!input.jspa?containerType=14&container=2110&content Type

And How System calculate below corrected forecast values?

Please help to understand calculation.

[UmeshMali4994]

Hello Mr,

Please check below link for seasonal trend calculation formula, Insert values and try to cross check result.

I hope this link helpful to you.

Forecast with Seasonal Trend Model - Forecasting - SAP Library

https://help.sap.com/saphelp_scm70/helpdata/en/46/a605b9d57052b8e10000000a155369/content.htm

Thanks & Regards
Umesh Mali

[babarkhan_mujawar]

Hi Umesh,

I try this already and that why i have posted this..

Don't know which value is system taking.

Can anyone explain step by step, how this values are calculated ?

Regards,

[babarkhan_mujawar]

Please any reply for this Post..