Consider a laundry service that has 3 steps to its process. Step 1 is Washing, S

Question

Consider a laundry service that has 3 steps to its process.

Step 1 is Washing, Step 2 is Drying, Step 3 is Ironing & Step 4 is Packaging.

Step 1 Washing is a batch operation, with a batch size of 50 pieces of clothing, variable time of 15 seconds per piece and a fixed time of 20 minutes. There is one washing machine.

Step 2 Drying is also a batch operation, with a batch size of 40 pieces of clothing, variable time of 20 seconds per piece, and a fixed time of 60 minutes. There is one drying machine.

Step 3 is a manual operation where a team of 2 workers iron the clothes; each worker takes on average 3 minutes to iron a piece of clothing.

Step 4 is again a manual operation, where only one worker packages the clothes in an average of 2 minutes per piece; only 50% of the clothes need packaging.

Answer the next several questions based on the data above.

The capacity at the packaging step in pieces of clothing that need packaging is (pick the closest integer)

Question 29 options:

a. 30 per hour

b 40 per hour

c 50 per hour

d 10 per hour

a. 30 per hour

b 40 per hour

c 50 per hour

d 10 per hour

Explanation / Answer

Capacity for each step is as below:

Step 1 = For 1 batch, Total time = Fixed time + 50*variable time = 20 + 50*15/60 = 32.5 minutes

Units per hour = 60*50/32.5 = 92.3

Step 2 = 60 + 40*20/60 = 73.3 minutes

Units per hour = 60*40/73.3 = 32.73

Step 3 = One worker takes 3 minutes. So output = 20 per hour. With two it is 40 per hour

Step 4 = 2 minutes per piece. So, 30 units per hour.

Ans: a (30 units)

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