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PK0-005 Ishikawa diagram Practice Question
During a project audit, it is discovered that several deliverables did not meet quality standards. The project manager wants to identify the root causes. Which tool is most appropriate?
⚠ Common exam trap
Candidates often confuse correlation with causation and may choose the scatter diagram, but root cause analysis requires a cause-and-effect approach provided by the Ishikawa diagram.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ishikawa diagram
The Ishikawa diagram (also known as fishbone diagram) is the most appropriate tool for identifying root causes of quality issues. It helps systematically brainstorm and categorize potential causes, making it ideal for root cause analysis in project audits. Scatter diagrams show relationships between variables but do not identify root causes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Scatter diagram
Why it's wrong here
Scatter diagrams plot two variables to reveal correlation, but they do not directly identify root causes; correlation does not imply causation.
- ✗
Pareto chart
Why it's wrong here
Pareto charts prioritize issues by frequency or impact but do not analyze root causes in depth.
- ✓
Ishikawa diagram
Why this is correct
Correct. The Ishikawa diagram is specifically designed for root cause analysis by visually mapping cause-and-effect relationships.
- ✗
Control chart
Why it's wrong here
Control charts monitor process stability over time and detect variations, but they do not identify root causes.
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