Cause Analysis Tools
Cause analysis tools are helpful tools for conducting a root cause analysis for a problem or situation. They include:
- Fishbone (Ishikawa) diagram: identifies many possible causes for an effect or problem and sorts ideas into useful categories.
- Pareto chart: shows on a bar graph which factors are more significant.
- Scatter diagram: graphs pairs of numerical data, with one variable on each axis, to help you look for a relationship.
Cause Analysis Tools in Practice
Learn how cause analysis tools can fit into your root cause analysis efforts.
Case study: Quality Revolution Reduces Defects, Drives Sales Growth at 3M
By combining Lean Six Sigma and a Top-200 customer focus, 3M improved its belt fabrication processes, reducing defects in parts per million by a factor of 28 times as sales increased by 54 percent.
Case study: Wind Power Company Gets to the Root of an Icy Issue
A root cause analysis project saved Clipper Windpower $1 million in lost revenue while increasing customer satisfaction.
Article: Under Scrutiny
A new approach to root cause analysis can help clear up misconceptions.
Article: Get to the Root of It
Use an is/is not comparative analysis tool to pinpoint the problem.
Article: Using the Cumulative Line
How a Pareto chart can help you track the progress of your corrective efforts.
Article: Is There a Relationship Here?
How a scatter diagram can help you determine if there's a correlation between two variables.
Article: Tools@Work: More New Twists on Traditional Quality Tools and Techniques
Tips for using Ishikawa diagrams and Pareto charts in non-traditional applications.