Question: Week 1 2 3 4 5 6 7 8 9 10 Requirement 30 12 72 11 24 42 35 30 75 68 Opening Inv. 0

Week

1

2

3

4

5

6

7

8

9

10

Requirement

30

12

72

11

24

42

35

30

75

68

Opening Inv.

0

0

0

0

0

0

0

0

0

0

Lot for Lot production

30

12

72

11

24

42

35

30

75

68

Closing Inv.

0

0

0

0

0

0

0

0

0

0

Avg. Inv

0

0

0

0

0

0

0

0

0

0

Holding cost (0.6 per unit per week)

0

0

0

0

0

0

0

0

0

0

Setup cost (132/production)

132

132

132

132

132

132

132

132

132

132

Total cost (Setup + Holding cost)

132

132

132

132

132

132

132

132

132

132

The total cost across 10 weeks = 1320

Week

1

2

3

4

5

6

7

8

9

10

Requirement

30

12

72

11

24

42

35

30

75

68

Opening Inv.

0

369

357

285

274

250

208

173

143

68

One time production

399

0

0

0

0

0

0

0

0

0

Closing Inv.

369

357

285

274

250

208

173

143

68

0

Avg. Inv

369

541.5

463.5

416.5

387

333

277

229.5

139.5

34

Holding cost (0.6 per unit per week)

221.4

324.9

278.1

249.9

232.2

199.8

166.2

137.7

83.7

20.4

Setup cost (132/production)

132

0

0

0

0

0

0

0

0

0

Total cost (Setup + Holding cost)

353.4

324.9

278.1

249.9

232.2

199.8

166.2

137.7

83.7

20.4

The total cost across 10 weeks = 2046.3

b) Assume now that production capacity in any period is limited to a maximum production amount of 100. Create a feasible production plan with setups in periods 1, 3, 6, 8 and 10 considering this restriction. What is the cost of this plan? What happens if the maximal production is less than 40?

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