The problem
Workflow diagrams are essential for understanding how work actually moves through a team or system. They reveal handoffs that nobody talks about, decisions that have no explicit owner, and steps that are supposed to be one minute but are actually taking two days. Drawing the diagram forces the team to describe the process precisely — vague processes become precise when you have to put every step in a box and every handoff on an arrow.
The whiteboard is the right tool for this because workflow diagrams evolve during the session. You start with what you think the process is, and someone in the room says 'actually, there's a step before that' or 'that handoff doesn't go to Design, it goes to Legal first.' The board gets revised in real time. The final board is the accurate version.
But workflows on whiteboards are process documentation, and process documentation needs to live somewhere accessible. A whiteboard workflow that gets photographed and filed in a folder is not a living document. It won't be updated when the process changes. A clean written workflow description, stored in the team's wiki, gets updated.