Kanban is a methodological approach and system for visualizing and managing workflow, originating from lean manufacturing principles, studied as a concept in operations management and process improvement. It focuses on optimizing flow and efficiency within complex work systems by identifying and addressing bottlenecks. As a research topic, it investigates process dynamics, the impact of constraints, and the effectiveness of pull-based systems in improving lead time, predictability, and quality. Key characteristics include the use of visual boards, explicit process policies, limiting work-in-progress (WIP), and continuous measurement and improvement of flow metrics. Its significance lies in its broad application across various domains to enhance productivity, predictability, and responsiveness by promoting transparency and adaptive management of work processes.