While DMN adoption continues to accelerate, we can only admire the current frenzied interest in machine learning. Both technologies are trying to do similar things - make decisions - but they go about it in very different ways. DMN, which evolved from business rules and, before that, expert systems, is based on intuitive understanding of [...]
DMN is excellent at working with tables of data. Such a table in DMN is called a relation. A relation is defined as a list of rows with a specific number of named columns. The number of rows in a DMN relation is unspecified. Most decision models work with tables in this form. But what [...]
Practical DMN: The Basics Want to learn DMN decision modeling without training? DMN Method and Style, 2nd edition is a good place to start. But to really learn it, you need to go beyond books. You need to get your hands dirty in a tool. I suggest starting with a free trial of Trisotech DMN [...]
My luck with publishing for Kindle has not been good. Most of my books' negative comments on Amazon are specific to Kindle issues, but since the paper and Kindle versions are linked, it reflects badly on the books overall. My first book BPMN Method and Style tried to use the original Kindle reflowable format. Even [...]
The link is https://www.amazon.com/Dmn-Method-Style-2nd-Pracitioners/dp/0982368178. As I posted recently, the second edition is completely rewritten and updated to DMN 1.2. The examples are all executable and the book follows closely my updated DMN Method and Style Basics (available now) and Advanced (about a week away) training. It's just gone up today, and looking lonely with zero reviewers. [...]
In any emerging area it is possible to be too early, and with DMN Method and Style, published in 2016, I plead guilty to that. It seemed like a good idea at the time. DMN 1.1 was finalized, and the bugs that had prevented implementation of DMN 1.0 were fixed. But it's one thing to have [...]
Today we released our completely revised and updated DMN Method and Style Basics training and certification, based on DMN 1.2 with the latest build of Trisotech DMN Modeler, including decision services, glossary, model import, and more. Price is the same, $695 including 60-day use of the tool and post-class certification. Click here to register. Here [...]
One of the most significant aspects of DMN 1.2 is the establishment of decision services as an important and useful feature of the standard. Decision services existed previously but offered little practical utility other than demarking units of execution within a DRD. Today that is just one of five distinct usage patterns for DMN decision [...]
Here we go again. We saw this eight years ago with BPMN 2.0. A revision of the standard allows tools to work 99% the same as in the previous version, but adds some new features around the edges. This causes the proprietary tool vendors to howl in unison: Not business friendly! Why can't it work [...]
The Decision Model and Notation (DMN) standard is changing the practice of decision modeling and management. Up to now, it has primarily been used to define model-based decision requirements handed off to developers for implementation in some other rule language. DMN is good for that, and actually most tools that claim to support DMN cannot [...]