Sequencing | AllAboutLean.com

A Few More Turns on the Changeover Wheel – Part 5: Frequently Asked Questions

Christoph Roser — Tue, 15 Mar 2022 11:00:48 +0000

In my last two posts I talked on how to set up a changeover wheel or, more generally, a changeover sequence. Next I will show you how to use a changeover wheel. The idea is simple, but there are some pitfalls as well as some tricks to make it easier. Let’s have a look. A ... Read more

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A Few More Turns on the Changeover Wheel – Part 4: Options for Prioritizing

Christoph Roser — Tue, 08 Mar 2022 11:00:12 +0000

In my last post of this series on the changeover wheel and changeover sequencing, I showed you the basics on how to use a changeover wheel or changeover sequence. In this post I will look at a few options and modifications that are sometimes used too. A Brief Recap We will continue the example from ... Read more

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A Few More Turns on the Changeover Wheel – Part 3: Prioritizing Jobs

Christoph Roser — Tue, 01 Mar 2022 11:00:18 +0000

In my last posts I talked on how to set up a changeover wheel or, more generally, a changeover sequence. Next I will show you how to use a changeover wheel. You have to fit you prioritized production into the sequence. The idea is simple, but there are some pitfalls as well as some tricks ... Read more

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A Few More Turns on the Changeover Wheel – Part 2: Improving the Sequence

Christoph Roser — Tue, 22 Feb 2022 11:00:35 +0000

In my last post I looked at how to create a changeover sequence. However, this was only the first draft of such a sequence. For a truly good sequence, you need to spend some more time optimizing the sequence. Try to get a better sequence, even though it is impossible to find the perfect solution ... Read more

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A Few More Turns on the Changeover Wheel – Part 1: Creating a Sequence

Christoph Roser — Tue, 15 Feb 2022 11:00:16 +0000

The changeover wheel is a visualization of a good changeover sequence. In this series of posts I will go deeper on how to use such a changeover sequence in planning your production sequence. The concept itself is simple, but there are still some pitfalls in using it. This first post looks deeper at generating a ... Read more

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Changeover Sequencing under Duress: Problems with Make and Deliver

Christoph Roser — Tue, 28 Dec 2021 11:00:10 +0000

In my last post I looked at strategies to manage changeover sequencing if your supplier gives you trouble. Basically, you can sometimes reduce the damage by fine-tuning the prioritization (i.e., by using the limited raw materials to make the most important parts). This second post in this series looks at similar situations if your customer ... Read more

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Changeover Sequencing under Duress: Problems with Source

Christoph Roser — Tue, 21 Dec 2021 11:00:09 +0000

Changeover sequencing helps you to produce more efficiently with smaller lot sizes, less inventory, and/or less changeovers. But despite a good changeover sequence, sometimes things blow up in your face. Your supplier does not deliver, your customer wants more than you planned, or your main process went belly-up and is waiting for repairs. In any ... Read more

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Replenishment Time Stability for Changeover Sequencing

Christoph Roser — Tue, 16 Nov 2021 11:00:14 +0000

Changeover sequencing is simply creating a production sequence that reduces the changeover effort. For example, in injection molding, colors are often changed from light to dark to reduce the cleaning effort. However, like all production sequencing (like leveling, lot sizing, prioritization,….), it adds to the replenishment time. Especially if you are using pull production, a ... Read more

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