Chapter 12: Process Control and Improvement:Root Cause Analysis (RCA) - 5 Whys, Fishbone Diagram
Abstract: Root Cause Analysis (RCA) utilizes tools like the "5 Whys" and the "Fishbone diagram" to systematically identify the underlying causes of a problem by repeatedly asking "why" to reach the root issue , while the Fishbone diagram visually displays potential causes categorized by factors like people, process, materials, and environment, helping to brainstorm and analyze potential root causes. Key points about 5 Whys and Fishbone diagrams: 5 Whys: A simple, iterative questioning technique where you repeatedly ask "why" about a problem to progressively uncover the root cause. Effective for straightforward problems where the causal chain is relatively short. Can be used alone or in conjunction with a Fishbone diagram. Fishbone Diagram (Ishikawa diagram): A visual representation of potential causes categorized into different categories (like "people," "process," "materials," "environmen...