Pareto diagram is a graphical tool used to prioritize problems based on their frequency. It is based on Pareto's principle that 80% of problems are caused by 20% of causes. This document discusses using a Pareto diagram to analyze reasons why students bunk lectures. Data from 120 students showed late wakeup, lack of attendance rules, and dislike of subjects were the most common reasons, collectively accounting for over 80% of bunking. Focusing efforts on addressing these key causes, like implementing biometric attendance and improving subject teaching, could significantly reduce bunking with minimal effort. Pareto analysis is a useful method for problem solving that helps prioritize where to focus for maximum impact.