Coverage profile and Forecast profile together

Dear all,
Can we use coverage profile and forecast profile together.What are the requirements for the same.
We are using coverage profile with following details
No. of periods=20
Type of period per length=1
Range of coverage in first period= 10
The forecast profile is set for
Historical periods=12
Initialisation period=2(Automatic,X)
Periods /season=12
Forecast periods=12
with different weighting groups.
But whenever forecasting is executed with some historical data for the 3 profiles it is giving same forecast values for all 3 profiles with different weighting groups.
Also the MRP type used here is a copy of the PD MRP type and not VV or VS.
Where can the problem lie?
Regards
Manisha

Dear
Coverage Profile and Forecast profile are two different subject  !
If it is range of coverage profile , then The range of coverage profile contains the parameters for calculating the dynamic safety stock. This is a statistical calculation on the basis of average daily requirements.With the dynamic safety stock, you can determine a safety stock based on requirements and range of coverage. The dynamic safety stock adapts automatically to the changed requirements and is fully available for planning purposes. You can limit the quantities used in the calculation of the dynamic safety stock by defining maximum and minimum ranges of coverage. You can also limit the period of time by defining different time periods in which the range of coverage is valid.
I hope you are asking about saferty caverage profile,,here basicalli we are setting the system to see how the safety stock is to be covered and calculated.See the help link below and come back if required
http://help.sap.com/saphelp_47x200/helpdata/en/f3/dbbb16b36111d1a6770000e83235d4/frameset.htm
https://wiki.sdn.sap.com/wiki/display/ERPLO/Dynamicsafetystock+calculation
Where as Forecasting Profile , please refer the below :
Profiles
One more query : Also the MRP type used here is a copy of the PD MRP type and not VV or VS.
I think you should use Forecast Base MRP type like VV  rather PD.PD does not carry out any Forcasting Functionality .Please check wether you replicate PD from VV , then it is possible to execute Forecast specially Total Consumption set up in MRP type .
Hope this will be useful
Regards
JH

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