What are the key differences between Kanban and Lean methodologies in terms of their approach to process optimization and efficiency?

Kanban and Lean methodologies both focus on optimizing processes and improving efficiency, but they have key differences in their approach. Kanban emphasizes visualizing workflow and limiting work in progress to improve efficiency, while Lean focuses on eliminating waste and continuous improvement through value stream mapping and problem-solving. Overall, Kanban is more focused on managing work in progress, while Lean is more focused on streamlining processes and reducing waste.