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The demand for subassembly S is 110 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, 1 unit of​ W, and 1 unit of X.​ Finally, each unit of U...

The demand for subassembly S is 110 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, 1 unit 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.

Construct a gross material requirements plan.

The product structure. The time-phased product structure. Level 1 2 3 4 5 67 Time in weeks


Solutions

Expert Solution

Answer: Demand for Sub-assembly S = 110 units Time -Week 7

The Gross requirements plan for the same is given in the following table:

Materials

Week 1

Week 2

Week 3

Week 4

Week 5

Week 6

Week 7

Lead time

V. Required date

Order release

220

220

1 week

W. Required date

Order release

220

220

220

220

3 weeks

X. Required date

Order release

220

220

220

2 weeks

Y. Required date

Order release

110

110

110

2 weeks

Z. Required date

Order release

220

220

1 week

T. Required date

Order release

220

220

1 week

U. Required date

Order release

110

110

110

2 weeks

S. Required date

Order release

110

110

110

2 weeks

Therefore, according to Gross Requirements material plan, 220 units of W and 110 units of Y production are started from day 1 of week 1. 220 units of W are released after 3rd week and 110 units of Y are released after 2nd week

In 2nd week 220 units of X and 220 units of Z production are started. 220 units of X are released after 3rd week and 220 units of 2 are released after 2nd week

At 3rd week – 220 units of Z and 110 units of Y are ready, so production of U which requires 220 units of Z and 110 units of Y is started from 3rd week. 110 units of U are produced bye end of 4th week

Also, in 3rd week – 220 units of production of V is started which are released by end of 3rd week

In 4th week, 220 units of T production is started which requires 220 units of V, 220 units of W and 220 units of X. 220 units of T are produced by end of 4th week

In 5th week – we have 220 units of T and 110 units of U which are required for production of 110 units of S. S requires lead time of 2 weeks and so by end of 6th week 110 units of S are produced

In 7th week – 110 Units of S are made ready

Amanda K answered 3 years ago
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