... percent of the problems are due to 20 percent of the causes. Pareto diagrams also can be used to summarize all types of data for 80/20 analyses. Chapter 8 − Project Quality Management A Guide to ... (COQ), and Continuous Improvement. Project Quality Management must address the management of the project and the product of the project. While Project Quality Management applies to all projects, ... seven of these are known as the Seven Basic Tools of Quality. .1 Cause and Effect Diagram Cause and effect diagrams, also called Ishikawa diagrams or fishbone diagrams, illustrate how various...