| Cause-and-Effect Diagram | This is also known as the “Ishikawa” or “fishbone chart” and can be used to identify the possible causes of a problem. |
| Check Sheet | This is a generic tool for capturing the frequencies and patterns of events such as defects or problems. |
| Control Chart | This is a graph that tracks how processes change over time. |
| Histogram | This is a tool for frequency distribution that shows how often different values occur. |
| Pareto Chart | This is a bar graph that shows the frequency of events in a process and determines which are the most significant. |
| Scatter Diagram | This is a graph that pairs variables and looks for relationships between them. |
| Stratification | This is a technique for separating and analyzing data from different sources to uncover patterns. |
