The demand for subassembly S is 120 units in week 7. Each unit of S requires 1 unit of T and 1 unit of U. Each unit of T requires 2 units of V, 1 unit of W, and 1 unit of X. Finally, each unit of U requires 2 units of Y and 2 units 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.

Construct a net material requirements plan using on-hand inventory (enter responses as whole numbers).

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

T	Gross req								1
	On hand
	Net req
	Order receipt
	Order release

U	Gross req								2
	On hand
	Net req
	Order receipt
	Order release

V	Gross req								2
	On hand
	Net req
	Order receipt
	Order release

W	Gross req								3
	On hand
	Net req
	Order receipt
	Order release

X	Gross req								1
	On hand
	Net req
	Order receipt
	Order release

Y	Gross req								2
	On hand
	Net req
	Order receipt
	Order release

Part 9

Z	Gross req								1
	On hand
	Net req
	Order receipt
	Order release

\begin{tabular}{cc|cc} \hline Item & On-HandInventory & Item & On-HandInventory \\ \hline S & 20 & W & 30 \\ T & 20 & X & 25 \\ U & 30 & Y & 40 \\ V & 30 & Z & 140 \\ \hline \end{tabular} The product structure. The time-phased product structure