Join Chris Croft for an in-depth discussion in this video Improving time performance: Queues, part of Process Improvement Fundamentals.
- We've seen that queues are the…main cause of long lead time.…And, they will build up in front of the bottle neck,…so you need to address that.…But, what about when you have enough capacity?…What happens then?…Here's an example.…Clearly, if you can serve ten people in an hour,…and you've got 12 people an hour arriving,…then the queue is going to get longer and longer…by an average of two people per hour.…After 20 hours, the queue will be 40 people…and you don't want that.…
But, what if you can serve ten people in an hour…and you only have eight people arriving?…Surely that's going to be fine, isn't it?…I want to show you that actually, it isn't…and that you're still going to get queues building up…even though it looks as if you should be fine.…In fact, it can be predicted that you'll have…an average queue length of four in this case.…But, before we get into calculating the size of the queue,…let's just think about how on Earth queues can build up…when you can serve ten people an hour…and you've only got eight arriving.…
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- Measuring processes
- Using statistical process control
- Optimizing the quality, cost, and time trade-off
- Understanding queues
- Reducing cost by reducing waste
- Improving delivery time
- Thinking about batch sizes
- Understanding Lean and Six Sigma processes