Troubleshooting trees save time and materials for automobile mechanics among many other professions. Why not for web handlers, too?
The simple answer is that they are extremely difficult to do well. Still, for the right problems, such as wrinkling and certain winding defects, they can greatly speed up the process of getting from information gathering to a remedy list.
Here is how to get started in the art and science of taxonomy. Web201.59a YouTube clip https://www.youtube.com/watch?v=J63DAmG0CpM