Pareto Chart
A Pareto chart is a type of bar chart that combines bars and a line graph to visually represent the Pareto principle, which states that roughly 80% of effects come from 20% of causes. It arranges data in descending order of frequency or impact, with bars showing individual values and a cumulative line indicating the total percentage. This tool is widely used in quality control, business analysis, and process improvement to identify the most significant factors contributing to a problem.
Developers should learn and use Pareto charts when analyzing data to prioritize issues, such as debugging software defects, optimizing performance bottlenecks, or managing project risks. It helps focus efforts on the 'vital few' causes that yield the most impact, making it valuable in agile methodologies, DevOps practices, and data-driven decision-making. For example, in software development, it can identify the most common bug types or resource-intensive code sections for targeted improvements.