1 2 D 3 4 MRP assignment 4.1 5 Lot-for-lot Model 6 7 Week Number 8 9 Item A: LT= 1 week 10 Gross Requirements 11 Scheduled Receipts 12 Projected on Hand 13 Net Requirements 14 Planned-Order Receipts 15 Planned-Order Releases 16 17 Item B: LT = 2 weeks 18 Gross Requirements 19 Scheduled Receipts 20 Projected on Hand 21 Net Requirements 22 Planned-Order Receipts 23 Planned-Order Releases 24 25 Item C: LT = 1 week 26 Gross Requirements 27 Scheduled Receipts 28 Projected on Hand 29 Net Requirements 30 Planned-Order Receipts 31 Planned-Order Releases EF G 0 16 12 50 H 2 15 40 I 3 15 J 4 18 K 5 8 L 6 12 Definitions: 1 Gross requirements: anticipated future usage of (or demand for) the item during each period. 2 Scheduled receipts: existing replenishment orders for the item due in at the beginning of each period. 3 Projected on hand: projected inventory status for the item at the beginning of each period. 4 Net requirements: calculated as Gross Requirements plus Scheduled Receipts minus Projected on hand. 5 Planned order receipt: planned receipt of replenishment orders at the beginning of the period. 6 Planned order releases: release of planned replenishment orders for the item using lead-time offset. Computations: 1 gross requirements = given in problem 2 scheduled receipts = given in problem if any 3 projected on hand for current week = projected on hand previous week + planned order receipts previous week - gross requirements previous week + gross requirements current week 4 net requirements = max [gross requirements - projected on hand),0] 5 planned order receipts = net requirements 6 planned order releases= planned order receipts in week X (where X is the week corresponding to the proper lead time for that item) Items A and C = 1 week lead time Items B 2 weeks lead time Product Structure Tree C A B (2)