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Develop a lot-for-lot solution and calculate total relevant costs for the gross

ID: 409954 • Letter: D

Question

Develop a lot-for-lot solution and calculate total relevant costs for the gross requirements in the following table* Period 12 3 4 56 7 8 9 10 11 12 60 Gross requirements20 30 70 3020 80 Holding cost = $3.50unitweek setup cost $200. lead time = 1 week beginning inventory: 40. Develop a lot for-lot solution (enter your responses as whole numbers) 123567 89 10 112 Period Gross requirements On-hand at beginning of period On-hand at end of period Order receipt Order release 20 40 30 70 30 20 80- 6E 40

Explanation / Answer

Please find below the filled up MRP table

Lead time = 1 week,

Period

1

2

3

4

5

6

7

8

9

10

11

12

Gross requirement

20

40

30

70

30

20

80

60

On hand at beginning of period : 40

40

20

20

0

0

0

0

0

0

0

0

0

On hand at end of period

20

20

0

0

0

0

0

0

0

0

0

0

Order receipt

0

0

20

0

30

70

30

0

20

80

0

60

Order release

0

20

0

30

70

30

0

20

80

0

60

0

Total quantity of inventory held per week basis = 20 ( period 1 ) + 20 ( period 2 ) = 40

Therefore, Total cost of holding = $3.5/ unit / week x 40 = $140

We presume that set up cost is incurred every time an order is released . There are total 7 times when orders have been released .

Therefore , Total set up cost = $200 per set up x 7 set ups = $1400

Hence, Total cost = Total set up cost + Total holding cost = $1400 + $140 = $1540

TOTAL RELEVANT COST = $1540

Period

1

2

3

4

5

6

7

8

9

10

11

12

Gross requirement

20

40

30

70

30

20

80

60

On hand at beginning of period : 40

40

20

20

0

0

0

0

0

0

0

0

0

On hand at end of period

20

20

0

0

0

0

0

0

0

0

0

0

Order receipt

0

0

20

0

30

70

30

0

20

80

0

60

Order release

0

20

0

30

70

30

0

20

80

0

60

0