Certified Quality Auditor (CQA) Prasctice Exam

The type of chart that presents the value of items in descending order is a:

1. Histogram

2. Pareto chart

3. U chart

4. Cusum chart

The correct answer is: Pareto chart

A Pareto chart is specifically designed to display data in a way that highlights the most significant factors in a data set. It presents values of items in descending order, allowing users to identify which items have the largest impact on a given outcome. The fundamental principle behind the Pareto chart is the Pareto principle, also known as the 80/20 rule, which suggests that a small number of causes often lead to a large portion of the effects. This descending order approach is particularly useful in quality auditing and management, as it allows teams to prioritize their efforts on the most critical issues first. By visually representing data this way, it becomes easier to recognize trends, such as which defects or issues are most prevalent, and to allocate resources more effectively to address them. In contrast, a histogram is used for displaying the distribution of numerical data, particularly frequency distributions over ranges of values, but it does not organize data into descending order. The U chart is specifically used for monitoring the number of defects per unit in a process, focusing on how quality varies with the number of items or opportunities for errors rather than presenting values in a ranked order. Likewise, the Cusum chart is a cumulative sum control chart that highlights shifts in process mean over time, rather than sorting