'Kanban is a popular framework used to implement agile software development. It requires real-time communication of capacity and full transparency of work. Work items are represented visually on a Kanban board, allowing team members to see the state of every piece of work at any time.' (Radigan, 2018)
All teams that use Kanban will utilise a Kanban board, this tool is used to see work and optimize the flow among the team members. While physical boards are still used in some teams, it is virtual boards that are a crucial feature in any agile software development tool. This is because virtual boards offer traceability, easier collaboration, and accessibility from multiple locations.
'In Japanese, Kanban literally translates to "visual signal." For Kanban teams, every work item is represented as a separate card on the board.'(Radigan, 2018)
The Kanban methodology relies upon full transparency of work and real-time communication of capacity, therefore the Kanban board should be seen as the single source of truth for the team's work.