Project Management: Foundations to Practice · Quality Management
Quality Tools and Root Cause Analysis
A handful of tools, developed decades ago by quality pioneers, remain the standard toolkit for turning a vague quality complaint into an actionable root cause.
Several quality tools associated with the work of quality pioneers Walter Shewhart, W. Edwards Deming, and Kaoru Ishikawa remain in widespread use in project quality management. The Ishikawa or fishbone diagram, developed by Ishikawa in the 1960s, visually maps potential causes of a problem across categories such as people, process, equipment, and environment, helping teams move past symptoms to identify genuine root causes [1].
Key Takeaways
- The fishbone diagram maps potential causes across categories (people, process, equipment, environment) to find genuine root causes.
- Structuring cause analysis by category prevents fixation on the first plausible cause while overlooking equally likely alternatives.
- Pareto analysis prioritizes the small number of causes responsible for the majority of a problem's impact.
- Control charts distinguish normal process variation from a genuine problem, preventing both overreaction and dangerous underreaction.