Industry 4.0 – What Works, What Doesn’t

Industry 4.0 is (still) all the rage in manufacturing industry. I’ve already took A Critical Look at Industry 4.0. A lot of Industry 4.0 is hot air with a return on investment only far into the future. However, there are a few ideas that actually may work soon enough. In this post I would like to give my views of what works in Industry 4.0 and what doesn’t. Continue reading Industry 4.0 – What Works, What Doesn’t

How to Deal With Long Delivery Times

Lean has a bunch of advanced but good tools for material delivery, like Just in Time, Just in Sequence, and Ship to Line. Using them is much easier on short distances and with short delivery times. Yet, sometimes you just don’t have the option of short delivery times. This blog post deals with the issues related to long lead times and delivery times. Continue reading How to Deal With Long Delivery Times

The Kingman Formula – Variation, Utilization, and Lead Time

The lead time of a system is heavily influenced by both the utilization and the variation. There are approximations available to estimate this relation, and one of them is the Kingman formula. In this post I would like to introduce you to this equation and describe the fundamental understanding of it. Luckily, you don’t really need the formula for your daily dose of lean. The equation itself has little practical use. However, this relationship is important for understanding the behavior of your production system. While you won’t use the Kingman formula to evaluate your production system, understanding the equation will help you in tweaking your system in the right direction.

Continue reading The Kingman Formula – Variation, Utilization, and Lead Time

Ship to Line

Ship to Line (STL) is yet another technique in lean to optimize your material flow. The idea’s gist is that instead of bringing material to the warehouse, you deliver it directly to the line or to the point of consumption. Like a freshly delivered pizza, you don’t put it on the shelf and eat it two days later.  However, for Ship to Line  to work, there are a few things to be aware of and to take care of. Let me explain: Continue reading Ship to Line

Just in Sequence Part 3 – What Can Go Wrong

This third and last post on Just in Sequence details all the things that can go wrong, and talks about how to fix them. The biggest problem is if the sequence of your Just in Sequence part does not match the main component that it should be sequenced to. This happens especially due to defects and rework. I also describe common options to deal with these problems – but be warned: all of them suck. As usual in lean, it is so much easier not to have problems in the first place than it is to deal with them afterward. Continue reading Just in Sequence Part 3 – What Can Go Wrong

Just in Sequence Part 2 – How to Do It

In this second post on Just in Sequence, I would like to talk about some details on the actual sequencing of parts: when to use Just in Sequence in the first place, which parts to sequence, and how to define the sequence. These are all organizational details to make Just in Sequence  work. In my next and last post of this series, I will describe how to handle problems with parts being out of sequence. Continue reading Just in Sequence Part 2 – How to Do It

Just in Sequence Part 1 – What Is It?

“Just in Sequence” (JIS) is a good way to supply material to high-mix, low-volume production. It combines well with “Just in Time” (JIT) and “Ship to Line” (STL), but neither are a prerequisite for Just in Sequence. In this series of posts I would like to talk about what Just in Sequence is, how it works, and what to be aware of. This first post details the basics of Just in Sequence production. Continue reading Just in Sequence Part 1 – What Is It?