Root-cause analysis is a key technique used in which quality improvement methodology?

Root-cause analysis is a key technique used in which quality improvement methodology?

• A. Six Sigma
• B. QI toolbox techniques
• C. Lean
• D. Process redesign

Answer: (C)

Root-cause analysis is a foundational problem-solving approach in Lean, where teams aim to identify the underlying cause of a problem rather than just addressing visible symptoms. In Lean practice, problems are tackled through a structured, iterative process—often using methods like the 5 Whys or a fishbone diagram within a PDCA cycle or A3 thinking. By drilling down to the true cause, the solutions target the real issue, preventing recurrence and reducing waste, which helps maintain smooth flow, reinforce standard work, and drive continuous improvement. This focus on durable fixes and learning embedded in daily operations is what makes root-cause analysis a hallmark of Lean. While other methodologies also use root-cause analysis, Lean emphasizes its practical, rapid application as part of everyday problem-solving.

Root-cause analysis is a foundational problem-solving approach in Lean, where teams aim to identify the underlying cause of a problem rather than just addressing visible symptoms. In Lean practice, problems are tackled through a structured, iterative process—often using methods like the 5 Whys or a fishbone diagram within a PDCA cycle or A3 thinking. By drilling down to the true cause, the solutions target the real issue, preventing recurrence and reducing waste, which helps maintain smooth flow, reinforce standard work, and drive continuous improvement. This focus on durable fixes and learning embedded in daily operations is what makes root-cause analysis a hallmark of Lean. While other methodologies also use root-cause analysis, Lean emphasizes its practical, rapid application as part of everyday problem-solving.