[Veuxdo]

Not the OP, but sequence diagrams show individual scenarios, by definition. And there can be a lot of scenarios in a complex system. Thousands, perhaps.

Relation (box-and-line) diagrams show the static relations between resources in a system, not individual scenarios. This typically gives a better overview.

Long story short, you need both. If you want the long story, I wrote (a lot) on this a couple of years back: https://www.ilograph.com/blog/posts/the-two-fundamental-type...

[dpflan]

- Thanks for the details and resources. Where is the "graph" in the post? When someone says graph I usually think of a pretty basic thing with nodes and edges.

- What're your thoughts on C4?