gATP check for future date in a Sales Order

Hi Experts,

My requirement for gATP check/ Product Availability Check is as below.

Requested Delivery Date  variation 1 :  When the requested delivery date is in the next week

ATP should check -->  Look at on hand stock + in transit stock

Requested Delivery Date variation 2: When requesteddelivery date is 6 weeks in the future

ATP should check --> Look at incoming STO

Requested Delivery Date varation 3: When requested delivery date is more than 6 weeks in the future

ATP should check -->  Look at only RLT

Here my for RDD variation 1 i can consider all stocks and Incoming STOs/ in transit orders in Scope of Check of Check Control.

But how to change the setting when the RDD is more than 2 weeks and <6 weeks or >6 weeks.

Your suggestions are highly appreciated.

Thanks & Regards,

Bala B.