Calculation of dates in Sales order in gATP

Hi
Can anybody please tell me how scheduling works for the following dates in sales orders for materials planned in gATP.
1) Unloading date 2) Delivery date 3) Goods issue date 4) Loading date 5) Material availability date 6) Transportation planning
My understanding is that gATP gives the MAD date and other remaining dates like transportation planning date, unload date etc are calculated using master data in the calling system eg ECC.
We are facing an issue in our system where if a material is planned in ECC, it has all dates in the sales order calculated as expected based on ECC master data.
If the same material is planned in gATP, it simply copies the MAD date to all other dates. So it is not considering the pick/pack , transportationplanning times from the ECC master data.
Is this standard system behaviour and to avoid this Do we need to activate Scheduling in gATP along with master data maintenence in APO ?or any user exit plus execution steps is avaialble to by pass APO master data mentaince.
Appreciate your responses...Regards - Amit

Amit,
We are facing an issue in our system where if a material is planned in ECC, it has all dates in the sales order calculated as expected based on ECC master data.
If the same material is planned in gATP, it simply copies the MAD date to all other dates.
The system where the parts are planned is irrelevant. The important issue is the system where the ATP is conducted.
My understanding is that gATP gives the MAD date and other remaining dates like transportation planning date, unload date etc are calculated using master data in the calling system e.g. ECC.
I have never seen that statement validated in any SAP documentation.
From online help:
SAP R/3 uses the order type to determine whether shipment scheduling or transportation scheduling should be executed.
If scheduling is activated, SAP R/3 determines a plant for the material for each item. If it is specified in the integration model that the availability check should take place in SAP APO for a material in this plant, transportation and shipment scheduling also takes place in SAP APO.
Standard SAP APO GATP supplies three different methods for shipment scheduling. If you are conducting ATP in APO, and you have not configured one of the three scheduling methods, then shipment scheduling does not take place, and the system will react as you have described.
Read up on it here
http://help.sap.com/saphelp_scm70/helpdata/EN/05/f8923945b12c4de10000000a114084/frameset.htm
Best Regards,
DB49

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Can you please explain the relation between delivery date and sales order date. In my case i can create delivery with delivery date as before the sales order date... how it is possible that i can create delivery before the sales order date.??
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Hi,
Sales order date: Date on which the customer officially places an order to your company.
All the commitment and product allocation counting starts with reference to this date.
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Below is the issue we realised during the testing. The issue is with First date in the Sales Order which is not updated as per Unloading Point Calendar .
As per details I received, it should refer Unloading Point Calendar for ShiptoParty and populate the next working day as First date into Sales Order.
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Calculation of dates in Sales order in gATP

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