Operational Research (O.R.)         case studies
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Operational Research (O.R.) case studies. What’s the problem?. www.LearnAboutOR.com. You are a shop manager…. You are opening a new branch and need to employ staff You want to keep your labour costs as low as possible. www.LearnAboutOR.com. Inexperienced staff are cheaper…

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Operational Research (O.R.) case studies

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Operational research o r case studies

Operational Research (O.R.) case studies


What s the problem

What’s the problem?

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You are a shop manager

You are a shop manager…

You are opening a new branch and need to employ staff

You want to keep your labour costs as low as possible

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Operational research o r case studies

Inexperienced staff are cheaper…

…but experienced staff are more productive

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Operational research o r case studies

How many experienced and inexperienced staff should you take on?

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What do we need to know

What do we need to know?

How much do you need to pay staff?

Inexperienced staff cost £5 an hour

Experienced staff cost £8 an hour

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Operational research o r case studies

How productive are inexperienced and experienced staff?

Inexperienced staff are two thirds as productive as experienced staff

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Operational research o r case studies

How many staff do you need?

You need the equivalent of

20 experienced members of staff

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Operational research o r case studies

Anything else you need to consider?

Head Office states that you must employ at least one experienced member of staff for every three inexperienced members of staff

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Let s summarise the problem

Let’s summarise the problem

We want to employ the equivalent ofat least 20 experienced members of staff with at least one experienced member of staff for every three inexperienced members of staffwith the minimum possible labour cost

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This is an example of linear programming

This is an example ofLinear Programming

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Linear programming problems

Linear Programming Problems

The aim is to choose the best combination of a number of quantities

to optimise the outcome, subject to certain constraints

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Another example of where this is used

Another example of where this is used

Factories that make several products: deciding how many of each to make weighing up several factors for each product such as the profit to be made, the demand, the time needed to produce it, etc.

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What next

What next?

Over the next few lessons, we will look at ways of approaching problems of this type…

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