When to Use a Tree Diagram

This prioritization tool is especially useful for tackling complex tasks, where it is not clear exactly what is to be done, or for any job where missing a small task could result in high costs. One common use of this prioritization tool is to take a large-scale project and break it down into specific tasks that can then be assigned to specific individuals. Similarly, a tree diagram can be used to break down a project into tasks that can then be prioritized or used to compile a schedule of deadlines for the project. Tree diagrams can also be helpful in analyzing seemingly simple projects that have not been smoothly implemented in the past. By breaking the job down into its components, it becomes clear where the problematic step was omitted or mishandled.

Learn more about the Quality Improvement principles and tools for process excellence in Six Sigma Demystified (2011, McGraw-Hill) by Paul Keller, or his online Green Belt certification course ($499).