Please help me to design following business process.
We have tank in which ROH material placed and outlet from tank is at 10 inch level. So the amount of ROH material under that outlet never consumed from the tank. Say it is 1 KG which is never getting consumed from the tank/system. This stock is in unrestricted @ MMBE. When we add more stock to the system SAP saws total stock = 1 KG + new stock = xx KG.
If requirement comes then system deduct stock from total qty, but business wants system to suggest - consumed pending stock (1 KG) first then unrestricted stock (new stock) against order (261 mov). I believe this we can handle using stock determination rule, but I'm not sure how to do that.
Please suggest if you have any idea.