Which Lean term refers to waste from unnecessary motion, inventory, and processing steps?

Which Lean term refers to waste from unnecessary motion, inventory, and processing steps?

• A. Mura
• B. Muri
• C. Muda
• D. Kaizen

Answer: (C)

Waste in Lean is anything that doesn't add value to the customer. Muda is the Lean term for that kind of waste. It covers activities that consume time, materials, or space without contributing to the product or service, such as unnecessary motion, excessive inventory, and unnecessary processing steps. Eliminating Muda helps improve flow, reduce lead times, and cut costs. By contrast, Mura means variation in the process that creates uneven workloads, and Muri is overburden on people or equipment. Kaizen is the practice of continuous improvement to address waste and other problems. So the waste described—unnecessary motion, inventory, and processing steps—fits Muda.

Waste in Lean is anything that doesn't add value to the customer. Muda is the Lean term for that kind of waste. It covers activities that consume time, materials, or space without contributing to the product or service, such as unnecessary motion, excessive inventory, and unnecessary processing steps. Eliminating Muda helps improve flow, reduce lead times, and cut costs. By contrast, Mura means variation in the process that creates uneven workloads, and Muri is overburden on people or equipment. Kaizen is the practice of continuous improvement to address waste and other problems. So the waste described—unnecessary motion, inventory, and processing steps—fits Muda.