The pink items where selected from the chapter table of contents. The following cluster is based on Chapter 27 of your text. As you can see the detail increases as you move toward the outside. This can be seen following the Test Equipment-Bench Equipment portion. The University of BC Learning Centre notes on clustering Inspiration examples.
Inspiration is a great piece of software for creating clusters.
The troubleshooting example above was created with inspiration. FAQ A web site design using a cluster as a design tool.