An organization's quality control team has informed the project manager that a project deliverable is not within specifications. Which of the following tools would be the MOST useful to determine the

Key Performance Indicators (KPIs) measure the performance and health of a project but do not directly break down or categorize the frequency of specific issues causing problems.

A Scatter Diagram is used to analyze the relationship between two different variables, indicating correlation, not the frequency of common issues.

A Pareto Chart visually organizes and displays issues by frequency from highest to lowest, making it the most effective tool for identifying the 'vital few' problems or causes that account for the majority of non-conformance. This helps the project manager prioritize and address the most significant issues efficiently.

A SWOT Analysis identifies strengths, weaknesses, opportunities, and threats for strategic planning, which is not the primary purpose for pinpointing common operational issues.