In lean, the concept of “flow” is important. But what is it? In this post I would like to look deeper into this important concept using another flow we are all (much too) familiar with: traffic flow!
Material Flow
How the Corona Virus affects Logistics
The coronavirus, also known as COVID-19 or SARS-CoV-2, is running through the world like a wildfire. Besides killing hundreds of thousands of people, it is also creating a huge headache for the economy. Many countries are currently experiencing a second wave. In this post I will look at how the pandemic affects supply chains, how they react, and how this may shape supply chains in the future.
How to Convert a Job Shop into a Flow Shop – Part 2
How to Convert a Job Shop into a Flow Shop – Part 1

Job shops are always very difficult to manage. As I described in my previous posts, the irregular material flow causes fluctuations that are very hard to contain. In my view, the only true fix for a job shop is to convert it into a flow shop. In this post I will talk a little bit about how you approach the idea of converting a job shop into a flow shop … although this is not always possible. However, in many cases it is possible to increase flow-shop-like segments, even though the whole system is still a job shop.
Why Are Job Shops Always Such a Chaotic Mess? Part 2

Job shops are a mess. Period. The increased and uneven levels of inventory cause a host of other problems. In my last post I described how these inventory imbalances are caused by irregular material flow, how subsequent safety buffers increase inventory even more, and how this causes staff to change their workplace irregularly in a job shop. In this post I will continue the long list of ills in a job shop with staff changeover losses, extra searching and organizing, fluctuating lead times, and general un-plannability of job shops.
Why Are Job Shops Always Such a Chaotic Mess? Part 1

Job shops have a strong tendency toward chaos. Even well managed plants struggle to maintain order in a job shop. This is due to the inherent nature of a job shop, and there are no good solutions to manage job shops. The only good way to improve a job shop is to turn it into a flow shop. I will talk more about such changes later in this short series, but first let me explain why job shops are always a mess.