Question

The demand for subassembly S is 100 units in week 7. Each unit of S requires 2 units of T and 1 unit of U. Each unit of T requires 1 unit of V, 2 units of W, and 1 unit of X. Finally, each unit of U requires 1 unit 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, 1 week to make V, 3 weeks to make W, 2 weeks to make X, 2 weeks to make Y, and 1 week to make Z. Click the icon to view the product structure and the time-phased product structure. Construct a gross material requirements plan (type 0 if the input box is not used). Week Lead Time (weeks) Item 1 2 3 4 5 6 7 S Gross req Order release 2
solved item S, T, U, V, W, X, Y, Z

Answer 1

A gross Requirement Plan showing gross requirements and order release date.
		Weeks
Items	Period	1	2	3	4	5	6	7	Lead Time
S	Gross requirements	0	0	0	0	0	0	100	2 weeks
Order release	0	0	0	0	100	0	0
T	Gross requirements	0	0	0	0	200	0	0	1 weeks
Order release	0	0	0	200	0	0	0
U	Gross requirements	0	0	0	0	100	0	0	2 weeks
Order release	0	0	100	0	0	0	0
V	Gross requirements	0	0	0	200	0	0	0	2 weeks
Order release	0	200	0	0	0	0	0
W	Gross requirements	0	0	0	400	0	0	0	3 weeks
Order release	400	0	0	0	0	0	0
X	Gross requirements	0	0	0	200	0	0	0	2 weeks
Order release	0	200	0	0	0	0	0
Y	Gross requirements	0	0	100	0	0	0	0	2 weeks
Order release	100	0	0	0	0	0	0
Z	Gross requirements	0	0	200	0	0	0	0	1 weeks
Order release	0	200	0	0	0	0	0

Explanation:

Gross requirement of T and U will be at the time of order release of S as they are subparts of S

Gross requirement of V, W & X will be at the time of order release of T as they are subparts of T

Gross requirement of Y & Z will be at the time of order release of U as they are subparts of U

Gross requirement of T will be two times of the order release of S as it requires 2 parts to make one S. Gross requirement of U will be equal to the order release of S as it requires 1 parts to make one S

Gross requirement of V and X will be equal to the order release of T as it requires 1 part to make one T. Gross requirement of W will be two times of the order release of T as it requires 2 parts to make one T

Gross requirement of Y will be equal to the order release of U as it requires 1 part to make one U and Gross requirement of Z will be two times of the order release of U as it requires 2 parts to make one U

С D E F G H Weeks 1 2 3 4 5 6 7 Lead Time 0 0 0 0 0 0 100 0 0 0 0 0 0 2 weeks =14 =G5*2 0 0 0 0 0 0 0 0 lo =G6 0 0 0 1 weeks 0 0 0 0 =G5 0 0 0 0 0 0 0 0 2 weeks А B 1 A gross Requiremen 2 3 Items Period 4 Gross requirements 5 S Order release 6 Gross requirements 7 T Order release 8 Gross requirements 9 U Order release 10 Gross requirements 11 V Order release 12 Gross requirements 13 W Order release 14 Gross requirements 15 X Order release 16 Gross requirements 17 Y Order release 18 Gross requirements 19 Z Order release 1=G8 0 0 0 0 0 0 =F7 lo 0 =F10 0 lo 0 0 2 weeks 0 0 0 0 0 0 =F12 0 0 0 0 3 weeks =F7*2 0 =F7 0 0 0 0 0 0 10 0 0 =F14 10 10 0 0 2 weeks 0 0 lo 0 0 0 10 =E16 =E9 10 =E9*2 0 0 0 0 2 weeks 0 0 0 0 0 0 0 0 =E18 0 0 0 0 1 weeks