Extending the Bounded Context Canvas with BDD Examples

Ever since Nick Tune introduced the world to the Bounded Context Canvas, I incorporate it in my workshops and trainings. Nick sees the canvas as a checklist for designing our Bounded Context canvas. For me, it is also perfect as a visualisation tool to make the Bounded Context explicit. The one thing I am missing is examples in the form of acceptance criteria discovered and eventually formalised during our Behaviour Driven Development flow. In this post, I explain how I extended the Bounded Context Canvas with BDD examples from Example Mapping to show how to formalise the behaviour of a Bounded Context.


Heuristics on approaching Example Mapping

While Bruno Boucard, Thomas Pierrain, and I were preparing our DDDEurope 2019 workshop, we discussed how to approach Example Mapping. For the workshop, we were combining EventStorming and Example Mapping to go from problem space to solution space. The way I have been approaching Example Mapping was slightly different then Thomas and Bruno did. Mine followed up more on EventStorming, standing in front of a wall storming examples first with stickies. Bruno and Thomas do it the way that was described byMatt Wynne from cucumber, standing in a group around a table, starting with a user story and one rule written on index cards. So we began to discuss in short what these difference are, and what the trade-off was when we did these. In this post, I will explain the different heuristics on approaching Example Mapping in this post.


Model Exploration Whirlpool – Domain-Driven Design: The First 15 Years

with EventStorming and Example Mapping

This article was published in the leanpub book: Domain-Driven Design: The First 15 Years


People often ask for more concrete guidance on how to explore models, especially in an Agile or Lean setting. The model exploration whirlpool is Eric Evans attempt to capture such advice in writing. It is not a development process, but a process that fits in most development processes. The central theme revolving the process is to keep challenging the model. While the process itself for most is straightforward and easy to understand, there are not many concrete examples to find on how to do such a model exploration whirlpool. Most people when starting to use Domain-driven design (DDD) are looking for these practical examples. In this article, I will tell you my story of how I used the model exploration whirlpool by combining EventStorming, a technique that came from the DDD community, and Example Mapping, a technique from Behaviour Driven Development (BDD) community.