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