In a rapid root cause analysis for sudden plant-line failure, which sequence is commonly followed?

• A. Gather data, define problem, generate possible causes, perform RCA (5 Whys/Ishikawa), identify root cause, implement corrective actions, verify effectiveness
• B. Guess a cause and fix
• C. Only collect data and do nothing
• D. Inspect, replace, test, document

Answer: (A)

Solving equipment failures quickly and reliably requires a structured, data-driven approach. Start by gathering data and clearly defining the problem so you know exactly what happened, where, and when. This sets the scope and avoids chasing the wrong issue. Then generate possible causes to ensure you consider multiple factors rather than leaping to a conclusion.

Using a formal root-cause method, like the Five Whys or an Ishikawa diagram, helps trace symptoms back to the true underlying cause rather than stopping at a surface fault. Once the root cause is identified, you implement corrective actions to prevent recurrence and then verify their effectiveness to ensure the fix works and doesn’t cause new problems.

The other options skip essential steps or rely on guesswork and incomplete actions, which is not a reliable way to restore a production line quickly or sustainably.