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Efficiency of bottleneck process

This topic has 3 replies, 2 voices, and was last updated 10 months ago by John Moffat.

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August 2, 2021 at 3:42 pm #630166
siawching
- Topics: 8
- Replies: 5
Good day Sir,

This is a question from the BPP Revision Kit:-

—–Scenario—-
Corrie
Restricted process: Alpha ( 8 hours per day: X=1200 units/hr, Y=1500 units/hr, Z=600 units/hr)

What is the efficiency of the bottleneck process given the output achieved is
X=6000 units
Y=4500 units
Z=1200 units

Answer: 125%

I’m not sure why the answer is 125%… Appreciate your help Sir…
August 3, 2021 at 8:10 am #630211
John Moffat
Keymaster
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X is expected to take 60/1200 = 0.05 minutes per unit. The actual production of 6,000 units is therefore expected to take 6,000 x 0.05 = 300 minutes.
Similarly the actual production of Y is expected to take 180 minutes and Z to take 120 minutes. So they would have expected the actual production to have taken a total of 600 minutes or 10 hours.

Given that they managed to achieve this in an 8 hour day, they are being more efficient than expected. Doing 10 hours worth of work in 8 hours gives an efficiency of 10/8 = 125%.
August 4, 2021 at 3:22 am #630322
siawching
- Topics: 8
- Replies: 5
Dear Sir,

Thank you very much for the explanation
Truly understand now
August 4, 2021 at 8:24 am #630340
John Moffat
Keymaster
- Topics: 57
- Replies: 49600
You are welcome 🙂
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