Which lean tool is used to visualize work and limit work in progress?

• A. KPI (Key Performance Indicator)
• B. Kanban
• C. DMAIC
• D. 5S

Answer: (B)

The Kanban method is specifically designed to enhance workflow visualization and to control the amount of work in progress (WIP) within a process. It employs visual signals, typically in the form of cards or boards, to represent tasks or work items as they move through various stages of production or development. This visibility allows teams to easily recognize their workload, prioritize tasks, and manage efficiency.

By limiting WIP, Kanban helps to reduce bottlenecks, minimizes stress on the team, and ensures a smoother flow of tasks, which directly contributes to increased efficiency and productivity. This lean tool fosters a pull-based system, where new work is only started when there is capacity, further driving the philosophy of continuous improvement inherent in lean methodologies.

In contrast, KPIs measure performance and progress but do not provide a visual representation of tasks. DMAIC is a structured problem-solving process used in Six Sigma for process improvement, while 5S is focused on workplace organization and standardization. None of these tools serves the dual purpose of visualizing work and limiting WIP like Kanban does.