PK0-005 Tools and Documentation Practice Question
A project manager uses a diagram to identify the most frequent causes of defects in a process. The diagram displays bars in descending order and a cumulative line. Which quality tool is being used?
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
✓
Pareto chart
A Pareto chart is a bar chart where bars are ordered from highest to lowest frequency, often with a cumulative line, to highlight the 'vital few' causes (80/20 rule). A fishbone diagram shows potential causes but not frequency. A control chart tracks variation over time. A scatter diagram shows correlation between two variables.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Fishbone diagram
Why it's wrong here
Fishbone diagrams show cause-and-effect relationships, not frequencies.
- ✗
Scatter diagram
Why it's wrong here
Scatter diagrams show relationships between two variables, not frequencies.
- ✗
Control chart
Why it's wrong here
Control charts monitor process variation over time with control limits.
- ✓
Pareto chart
Why this is correct
Pareto charts display bars in descending order and a cumulative line to show the most significant factors.
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Written by Johnson Ajibi, MSc IT Security
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