nw-ddd-event-modeling

Event modeling is a collaborative technique that visualizes system behavior on a timeline using events, commands, and read models. It helps domain-driven design by aligning stakeholders and consolidating requirements into a single living design artifact.

You write testable Given/When/Then specifications by mapping domain events on a timeline, identifying the commands that trigger them, and deriving projections. This explicit capture of events and commands produces directly testable specifications.

Yes, event modeling is designed for product, engineering, and design teams. It requires a collaborative approach to domain discovery and boundary definition, providing a shared visual artifact that reduces miscommunication across stakeholders.

The best way to start event modeling is to invite stakeholders, map the domain on a timeline, identify events and commands, and then derive read models. This produces clear definitions and testable specifications for robust design.

No, event modeling is technology-agnostic. It describes what happens in the system rather than how it is implemented, meaning it does not require a specific technology stack or framework to define events, commands, and boundaries.

Use event modeling instead of traditional specifications to reduce miscommunication. It provides a visual artifact that explicitly defines events, commands, and boundaries, consolidating requirements into a living design rather than static documents.