The demand for subassembly S is 90 units in week 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires 2 units of V, 2 units of W, and 1 unit of X. Finally, each unit of U requires 1 unit of Y and 3units of Z. One firm manufactures all items. It takes 2 weeks to make S, 1 week to make T, 2 weeks to make U, 2 weeks to make V, 3 weeks to make W, 1 week to make X, 2 weeks to make Y, and 1 week to make Z.

Suppose that in addition to 90 units of S, there is also a demand for 30 units of U, which is a component of S. The 30 units of U are needed for maintenance purposes. These units are needed in week 6. Additionally, a new order has been received for 80 units of S due in week 8. Modify the net material requirements plan to reflect these changes.

Construct a new net material requirements plan (enter your responses as whole numbers).

Item		Week								Lead Time
		1	2	3	4	5	6	7	8	(weeks)
S	Gross req									2
	On hand
	Net req
	Order receipt
	Order release

Item	On-Hand Inventory	Item	On-Hand Inventory
S	20	W	25
T	20	X	25
U	30	Y	110
V	20	Z	40