A Pareto diagram helps identify areas that need attention by ranking them.

• A. True
• B. False
• C. It is used to plot data without ranking
• D. It requires no data to implement

Answer: (A)

A Pareto diagram identifies areas needing attention by ranking categories from most to least significant, so the most impactful issues stand out on the left.

In practice, you gather data on different causes or categories, measure their frequency or overall impact, and then sort these categories in descending order. Each category gets a bar plotted in that order, creating a visual where the tallest bars (the biggest contributors) appear first. A cumulative line is often added to show the running total, highlighting how much of the problem is accounted for by the top contributors. This setup makes it easy to see the “vital few” issues that should be tackled first, aligning with the idea that a small number of causes often drive most of the effects.

The other ideas don’t fit because a Pareto diagram relies on ranking by magnitude and requires actual data to plot; without ranking or data, you can’t identify which areas are most significant or track progress.