Which diagram is commonly used to analyze the flow of people and materials in a facility?

Which diagram is commonly used to analyze the flow of people and materials in a facility?

• A. Ishikawa Diagram
• B. Spaghetti Diagram
• C. Swim Lane Diagram
• D. Value Stream Map

Answer: (B)

Mapping the physical flow of people and materials to identify wasted motion is the idea here. A spaghetti diagram is used for this purpose: you trace the actual routes that workers walk and items travel through a facility on top of a layout, using continuous lines that often resemble strands of spaghetti. This visualization makes it easy to spot long, unnecessary movements, backtracking, or crossing paths, which point to opportunities to rearrange work areas, equipment, or routes to reduce motion waste and improve flow. Other diagrams serve different objectives: an Ishikawa diagram helps analyze root causes of problems; a Swim Lane diagram maps process steps and who is responsible; a Value Stream Map looks at the end-to-end flow of value including information, materials, and timing across the process. The spaghetti diagram is the go-to for understanding actual movement patterns inside a facility.

Mapping the physical flow of people and materials to identify wasted motion is the idea here. A spaghetti diagram is used for this purpose: you trace the actual routes that workers walk and items travel through a facility on top of a layout, using continuous lines that often resemble strands of spaghetti. This visualization makes it easy to spot long, unnecessary movements, backtracking, or crossing paths, which point to opportunities to rearrange work areas, equipment, or routes to reduce motion waste and improve flow. Other diagrams serve different objectives: an Ishikawa diagram helps analyze root causes of problems; a Swim Lane diagram maps process steps and who is responsible; a Value Stream Map looks at the end-to-end flow of value including information, materials, and timing across the process. The spaghetti diagram is the go-to for understanding actual movement patterns inside a facility.