Which of the following in incorrect regarding Kanban?

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. The typical Kanban board has three columns: To Do, Doing and Done. It aims to help you visualize your work, maximize efficiency, and improve continuously. One of Kanban's primary functions is to ensure a manageable number of active items are in progress at any one time. If there are no work-in-progress limits, you are not doing Kanban. Conceptual discussions in live classes for solid foundation of concepts