Consider a laundry service that has 3 steps to its process. Step 1 is Washing, S
ID: 352479 • Letter: C
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 bottleneck step at the laundry service is:
Question 30 options:
a Washing
b Drying
c Ironing
d Packaging
a Washing
b Drying
c Ironing
d Packaging
Explanation / Answer
Bottleneck is
b. Drying
For washing it takes .8125 minutes to process 1 car
[Calculation: batch size: 50, Variable time: 15 seconds, Fixed time: 20 minutes
Total time: (50*15)/60 + 20 = 32.5 minutes, Time per piece: 32.5/50 = .8125 minutes]
For Drying it takes 1.833 minutes
[Calculation: batch size: 40, Variable time: 20 seconds, Fixed time: 60 minutes
Total time: (40*20)/60 + 60 = 73.33 minutes, Time per piece: 73.33/40 = 1.833 minutes]
For ironing 1person take 3 minute and there are 2 people, so it will take 1.5 minute per cloth
For packaging it takes 2 minutes per cloth but only 50% of cloth needs packaging, so on an average it will take 1 minute.
Therefore most time taken is by drying and hence the bottleneck step.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.