Question

In: Operations Management

Ace Steel Mill estimates the Demand for steel in millions of tons per year as follows...

  1. Ace Steel Mill estimates the Demand for steel in millions of tons per year as follows

Millions of t tons

Probability

10

10

12

25

14

30

16

20

18

15

  1. If capacity is set at 18 Million tons what is the capacity cushion
  2. What is the probability of Idle capacity
  3. What is the average utilization of the plant at 18 million ton capacity
  4. If it costs $8 million per ton of lost business and $80 million to build a million ton of capacity how much capacity should be built to minimize the total cost

Solutions

Expert Solution

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(a)

Capacity Cushion = Capacity(Nominal) – Average Demand

Capacity(Nominal) = 18

Average Demand = ((10x.10)+(12x.25)+(14x.30)+(16x.20)+(18x.15) = 14.1

Capacity Cushion = 18 - 14.1

Capacity Cushion = 3.9 million tons

(b)

To get idle capacity= sum for all probabilities where the demand is less than 18 million tons

Idle capacity=0.1 + 0.25 + 0.3 + 0.2

Idle capacity=0.85 or85%

(c)

Utilization = Output/Nominal Capacity

So we get (0.1x10/18)+(0.25x12/18)+(0.3x14/18)+(0.2x16/18)+(0.15x18/18)

Utilization 0.7833333 or 78.33% of average utilization

(d)

Capacity 10mn: (80 x 10) + 8( (12-10x.25)+(14-10x.3)+(16-10x.2)+(18-10x.15) = 832.8

Capacity 12mn: (80 x 12) + 8( (14-12x.3)+(16-12x.2)+(18-12x.15)) = 978.4

Capacity 14mn: (80 x 14) + 8( (16-14x.2)+(18-14x.15)) = 1128

Capacity 16mn: (80 x 16) + 8( (18-16x.15)) = 1282.4

Capacity 18mn: (80 x 18) + 8(0) = 1440

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