PP: MRP and Production order scheduling

SAP scheduling in MRP and Production orders explained below:


For MRP (Planned orders):
Available for Planning Date = Requirement Date
Order Finish Date = Avail. for Planning Date minus GR processing time
Order start date = Order finish date minus In house production time from Mat Master
Opening date = Order start date minus Opening Period from schedule margin key


When manually creating planned order, user enter the order finish date. Available for planning date is then obtained by adding the GR processing time to it.


For Production orders:
Scheduled finish Date = requirement date minus GR processing time minus float after prd.
scheduled start date = scheduled finish minus sum total of operation execution times - float before prod.
release date = scheduled start minus release period from schedule margin key.