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Operational Cases

Hi all, 

I am going to sit for an interview focusing on Operational Improvement or Supply Chain Management.

However, I am confused about several terms that are usually used in these types of cases. 

From my understanding, 

1) Capacity = number of units can be produced

2) Productivity = output/input or output/time

3) Utilisation = utilisation rate of a machine from its maximum capacity

4) Efficiency = output/input but in terms of quality

I am really confused about productivity and efficiency. Are productivity and efficiency the same?

Hope someone can answer my questions! Thanks!

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Ian
Coach
on Nov 03, 2021
Top US BCG / MBB Coach - 5,000 sessions |Tech, Platinion, Big 4 | 9/9 personal interviews passed | 95% candidate success

Hi there,

I like the way you're approaching this!

1) Capacity = number of units can be produced

Correct. Normally within a timespan (hours/days/week/years)

2) Productivity = output/input or output/time

Correct. For a given input (hours, lbs, etc) how much do we make)

3) Utilisation = utilisation rate of a machine from its maximum capacity

Correct.

4) Efficiency = output/input but in terms of quality

It's actually essentially the same as #2 (productivity), but almost flipped. For a given item produced, how little can we use?

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Agrim
Coach
on Nov 03, 2021
Top Awarded Coach | BCG Dubai Project Leader | Master Casing in 3hrs | 10y+ Consulting | Free Counselling
  1. Capacity = Theoretical maximum number of units can be produced in the line
  2. Labor Productivity = Units produced per employee per hour (also know as man-hour)
  3. Capital Productivity = Revenue produced per dollar invested in the line.
  4. Combined Productivity = Revenue produced per combination of dollar invested and labor employed. This is governed by theories like Cobb-Douglas Function.
  5. Utilisation = Actual units produced divided by theoretical maximum possible (capacity)
  6. Efficiency = Total man-hours of effort spent divided by the theoretical man-hours required based on an ideal labor productivity level
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Pedro
Coach
on Nov 03, 2021
BAIN | EY-P | Most Senior Coach @ Preplounge | Former Principal | FIT & PEI Expert

Productivity is how much output there is per input unit.
Efficiency is the percentage of the actual output to the expected output (if everything was working well).
 

Profile picture of Antonello
on Nov 07, 2021
McKinsey | NASA | top 10 FT MBA professor for consulting interviews | 6+ years of coaching

Hi!

I think you're actually on the right track and I agree with your definitions.

Best,

Anto