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Q: What is the objective of work centre scheduling? Why does batching cause so much trouble in job shops? Why is managing bottle-neck’s so important in job shop scheduling
A: The objectives of work-center scheduling are to meet customer due dates, minimize lead-time, minimize set-up time, minimize work in process inventory, and maximize machine or labor utilization. [ Batching can lead to split lots, broken setups, [ lost parts, defects and late deliveries. Managing bottlenecks is important because bottlenecks constrain capacity and limit throughput. Poor bottleneck
management can lead to large WIP's. ]
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Asked 2/22/2012 10:06:06 PM
Updated 2/22/2012 10:21:44 PM
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Work centre scheduling is typically designed to meet a range of objectives with the balance of these objectives being determined by the strategy of the organisation. The five common objectives are:

1. Meet due dates: Delivering the product to the customer on the date promised.

2. Minimise lead time: Minimise the time that the product is in production to minimise inventory levels and respond to customer demand quickly.

3. Minimise setup time or cost: Grouping product in economic batch quantities to minimise the expense of setup to change between products.

4. Minimise work-in-process inventory: Often as part of a lean operations approach.

5. Maximise machine utlisation: To get the most out of expensive equipment.

This video examines some of the issues that schedulers with Southwest Airlines have to deal with:
Added 2/22/2012 10:21:44 PM
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