This is an excellent book on the practical application of Theory of Constraints, with some updates and modifications brought about by years of practice.
If you’re in a traditional command and control company, everything here will be valuable. If you’re in a company that is moving beyond Command and control, the practices will still work, but some of the assumptions will feel off.
I have a few problems with an otherwise excellent book:
First, the unspoken assumption that extrinsic motivation is what makes people work, and that creating change in a company requires the use of performance management and behaviourism. Thankfully, that part of the book is both very short, and prefaced with a disclaimer that the psychological aspect of creating change is out of scope for this book.
Second, it also seems clear that Dettmer has not applied his work in industries that are predominately creative in nature. His presentation of the material assumes that your plan for change will work and have the desired impact, even going so far as to suggest you can turn the completed PRTs into a project plan. In my experience, that degree of certainty in future outcomes is impossible to achieve - plans for the future are probabilistic, not deterministic. The reason learning loops exist (PDCA, OODA, etc) is because our knowledge of the system will always be imperfect.
“No plan survives first contact with the enemy”
“Everybody has a plan until they get punched in the face.”
The plan may work. Aspects of it may work. But the entirety of it certainly won’t work as originally envisaged. There needs to be room for experimentation, learning, and adaptation in our plans for the future, and I don’t think he conveys that, at all.
Overall, a brilliant book on the application of the logical thinking tools from Theory of Constraints, with a few minor issues.