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User Journey Diagram
User journeys describe at a high level of detail exactly what steps different users take to complete a specific task within a system, application or website. This technique shows the current (as-is) user workflow, and reveals areas of improvement for the to-be workflow. (Wikipedia)
Mermaid can render user journey diagrams:
Code:
mermaid
journey
    title My working day
    section Go to work
      Make tea: 5: Me
      Go upstairs: 3: Me
      Do work: 1: Me, Cat
    section Go home
      Go downstairs: 5: Me
      Sit down: 5: Me
Render:
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Each user journey is split into sections, these describe the part of the task the user is trying to complete.
Tasks syntax is Task name: <score>: <comma separated list of actors>