UML stands for Unified Modeling Language. It was created to facilitate the communication and documentation of IT designs and architectures. A UML sequence diagram is a type of dynamic behavior diagram that illustrates how objects interact and the sequence of those interactions.
While a UML class diagram depicts the structure of classes and interfaces, a sequence diagram focuses on the processes and interactions between objects or within an object. However, defining a precise sequence diagram can be more complex. It typically contains more elements than a class diagram. As with any tool, it's important to use the sequence diagram for its intended purpose.
For slightly more complex cases, implementing a sequence diagram may require significant effort. Challenges arise when you need to update the diagram, such as adding an object, actor, or new messages in the middle. For these situations, I recommend using DSL-based tools to implement and manage the diagram effectively.
When to use ✔️
- ✔️ Planning refactoring
- ✔️ Describing dynamic behavior
- ✔️ Describing processes
- ✔️ Network topology
- ✔️ Event driven designs
- 😐 Identifying relationships
When to avoid ❌
- ❌ Designing system architecture
- ❌ Documenting the system architecture
- ❌ Database schema design
- ❌ Large systems
- ❌ Static structure
- ❌ Exposing too much implementation details
