Chris Hohmann

Chris Hohmann
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Chris Hohmann

 •  November 18

Inventories and Work In Progress (WIP) can be helpful clues to visually identify the bottleneck or constraint in a process, but they can also be insufficient or even misleading as I explained in part 2 of this series. It is often also necessary to study material and parts routes to really understand where they get stuck and delayed. Chances are...

Chris Hohmann

 •  November 11

In this post I explain the difference between enablers and triggers in logic trees, which basically is explaining how Necessity logic differs from Sufficiency logic. I then explain the basic assumption when building a Goal Tree and why the Goal will not automatically be achieved even if a most of Necessary Conditions are fulfilled. Necessity-based...

Chris Hohmann

 •  October 25

When trying to find the system’s constraint, why not simply asking the middle management? At least when Theory of Constraint was young, our world spinning slower and processes simpler, the foremen usually had a common sense understanding of their bottleneck. They knew what machine to look after, and what part of their process to give more...

Chris Hohmann

 •  October 22

A very common question once people get familiar with Theory of Constraints and the notion of bottlenecks and constraints is how to find them in a process. Identifying the constraint is key as the constraint, by its nature, controls the performance of the whole system. The trouble with examples given in textbooks or case studies is that they are...

Chris Hohmann

 •  October 19

This post is inspired by some pictures* in Mike Rother’s book “Toyota Kata”, very relevant in our actual changing times and complex situations. I really like the figures that remind that the journey towards a goal requires entering unclear territory at some point. Experience from the military tells that no plan, regardless how carefully it was...

Chris Hohmann

 •  October 6

Autonomous maintenance is one of the 8 Total Productive Maintenance (TPM) pillars, it aims to give both competence and responsibility for routine maintenance, such as cleaning, lubricating, and inspection to operators. The aims and targeted benefits of autonomous maintenance The ultimate goal of Total Productive Maintenance is to enhance machines’...

Chris Hohmann

 •  September 23

In this post: The youngest among my blog readers may not understand what I mean with Total Productive Maintenance, this pre-Lean management approach to maximize machines and equipment effectiveness and aiming to improve companies’ performances. In a nutshell, Total Productive Maintenance or TPM in short, originated in Japan, 1971. It was a...

Chris Hohmann

 •  September 3

Promoters of any solution or change agents of are usually in love with the object of their promotion. Love is said to be blind and oblivious of any negative aspect of the loved thing. That is why so often promoters of change highlight all the benefits of the change, regardless of any Undesirable side Effects for the people they try to convince to...

Chris Hohmann

 •  August 31

Lean leading figure Jim Womack posted a sincere and critical reflection (hansei) on where Lean has failed and why not to give up. I was impressed when reading it and it reinforced my respect and admiration for the author. You can read the August 29th, 2017 post on planet lean...

Chris Hohmann

 •  August 21

Maturity assessments are a kind of qualitative audit during which the current “maturity” of an organization is compared to a maturity reference model and ranked accordingly to its score. As explained in the wikipedia article about maturity model (https://en.wikipedia.org/wiki/Maturity_model), the implementation is either top-down or bottom-up, but...