Which role is primarily responsible for identifying root causes and proposing corrective actions for quality problems?

• A. Quality Planner
• B. Quality Investigator
• C. Quality Engineer
• D. Quality Auditor

Answer: (B)

Root cause analysis and proposing corrective actions are central to the Quality Investigator's responsibilities. When a quality problem arises, the investigator gathers data, examines processes, and uses structured problem-solving methods (such as 5 Whys or fishbone diagrams) to trace the issue to its underlying cause rather than just addressing symptoms. Once the root cause is identified, they propose targeted corrective actions to prevent recurrence and drive containment, verification, and closure. This role differs from a Quality Planner, who sets quality plans and metrics; a Quality Engineer, who designs and implements process improvements and engineering controls; and a Quality Auditor, who checks compliance and verifies that nonconformities are corrected. The investigator’s focus on deep analysis and actionable remedies makes them best suited to identify root causes and propose corrective actions.