Development and Evaluation of Large-Screen Digital Kanban with Smartphone Operation

The project is often visualized using the Kanban method in agile software development. The Kanban method is divided into two implementations: a physical Kanban and a digital Kanban. Both have particular advantages and disadvantages. Operating Kanban methods having the advantages of both have been proposed, but they require a high synchronization cost or a high price instrument. The authors developed a large-screen digital Kanban that has the advantages of both using a short-focus projector and a smartphone at a low cost. It has an interface using a two-dimensional (2D) code, a built-in smartphone camera, an acceleration sensor, a gyro sensor and a touch panel, so it can be operated without looking at the smartphone. Users can operate the Kanban while holding discussions in front of the Kanban board just like using a physical Kanban. From a result of evaluation of practicability, users will be able to operate our Kanban at a speed about equal to a physical Kanban if they practice the Kanban well.