A Swimlane diagram identifies which departments are involved in a process and shows what activities they are responsible for and where they fit in the overall process flow.

• A. A flowchart without departments
• B. An Organizational Chart of Departments
• C. A diagram that shows Departments and Responsibilities Across the Process Flow
• D. A Project Timeline

Answer: (C)

A Swimlane diagram maps a process by laying out the steps in order and assigning each step to a department or role, so you can see who owns each task and how work moves across departments as the process flows. This is exactly what the description “a diagram that shows Departments and Responsibilities Across the Process Flow” captures—the lanes (departments) along the flow show ownership and handoffs, clarifying accountability and sequence.

Why the other descriptions don’t fit: a flowchart without departments would show steps and sequence but not who is responsible for each step; an Organizational Chart of Departments focuses on reporting relationships rather than process steps and ownership; a Project Timeline emphasizes timing and milestones rather than the detailed flow of activities and interdepartmental responsibilities.