Best use case diagram tool Available in x mind.

I love how easy it is for Xmind to add sectional and/or related segments of ideas. For example, I can add main topics and then for each main topic, I can add subtopics. I also really like that I can add emojis to accent/highlight specific topics to follow back on.

This application is very convenient to create functional safety-related flow diagrams to link different inputs and conditions that play a role towards a goal. In addition, the outliner linked to the mind map helps understand the flow of the map.