Hi all
we have a vendor list calls preferred vendors.once pur req is created through mrp it should take only those vendors if someone change in source with other vendor list system shoud not consider it in mrp
second if we have p.o created from pur.req and now if some one try to change the vendor then
system should check if new vendor is part of prefered vendor list.if not system should not let user to change the vendor.
can some one provide me soulutinl in standard sap or any customization is need then wat type of.
Thanks