Other meanings of Kanban board
Project Management
A Kanban board is a visual workflow-management tool that uses cards and columns to track work as it moves through stages of a process. Originating from the Toyota Production System, it has become a cornerstone of agile and lean methodologies, enabling teams to visualize work, limit work in progress, and optimize flow.1
The Kanban board traces its roots to the late 1940s at Toyota, where engineer Taiichi Ohno developed a scheduling system to improve manufacturing efficiency. The term "kanban" means "signboard" or "billboard" in Japanese, and the system used physical cards to signal when more parts were needed, aligning production with actual demand.
In the 2000s, software developers adapted these principles into the Kanban method, formalized by David J. Anderson in his 2010 book Kanban. The method emphasizes visualizing work, limiting work in progress (WIP), and managing flow, making it applicable beyond manufacturing to knowledge work and services.2
A Kanban board typically consists of columns representing workflow stages, such as "To Do," "In Progress," and "Done," with cards representing individual work items. Each card contains essential information like task description, assignee, and due date, allowing teams to see the status of all work at a glance.
Key practices include limiting WIP to prevent overloading, using pull-based scheduling where work is pulled only when capacity is available, and continuously improving the process through metrics like cycle time and throughput. Boards can be physical (whiteboards with sticky notes) or digital (e.g., Trello, Jira), each offering unique advantages for distributed teams.3
While originally a manufacturing tool, Kanban boards are now used in software development, healthcare, education, and personal productivity. In software, they integrate with Scrum to form "Scrumban," combining the structure of sprints with the flexibility of Kanban.
Variations include "personal Kanban" for individual task management, "portfolio Kanban" for managing multiple projects, and "service delivery" boards for IT operations. Some boards add columns for "Blocked" or "Review" to reflect specific process needs, and "expedite" lanes for urgent items.4
Beyond the basic board, Kanban has subtle nuances. The "cumulative flow diagram" (CFD) is a powerful analytical tool that shows the number of work items in each stage over time, helping identify bottlenecks. The "class of service" concept categorizes work by urgency and cost of delay, influencing prioritization.
Kanban boards have also been used in non-business contexts, such as in classrooms to manage student assignments and in hospitals to track patient flow. A notable edge case is the "virtual Kanban" used in software-defined networking to manage data packets, demonstrating the principle's versatility.5
This article focuses on the Kanban board as a visual workflow-management tool, not the broader Kanban method or its manufacturing origins.
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