Product structure for end item A follows. The manager wants to know the material requirment for the purchased part D that will be needed to complete units of A by the start of week The manufacturing lead time for items of this order are one week for level and level items and purchase lead time of weeks for level items. There is a scheduled receipt of units of R at the end of week and units of D at the start of week Lotforlot ordering is used and there are no incentive on hand.