Join Chris Croft for an in-depth discussion in this video Thinking about your batch sizes, part of Process Improvement Fundamentals.
- We've seen earlier that smaller batches…lead to less stock or less work in progress…and all the benefits that come with that.…But of course, the reason we make things in batches…is to save the setting up cost.…If it takes you an hour to set up the machine…and then you can make one part every second,…how many would you make in a batch?…Actually, before I tell you the answer,…just think for a moment and decide…how many you would make in your batch.…An hour to set the machine up,…and then it makes one per second.…
Most people say an hour's worth,…which would be 3,600.…Having the production time…the same as the setting up time is a tempting…rough rule of thumb, but it's probably wrong.…For a start, do you really want 3,600?…What if you only use one a month?…Then you've just made 300 years' worth.…Much better to spend the hour setting up…and then just make 12.…So the usage rate must affect how many you make.…
What else would affect how many you make?…Well, the other factor would be storage cost.…If we're talking sofas, then you don't want…
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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