While they are commonly used, Tree structures usually don't work well for cases where user's don't know the location precisely i.e. when they are browsing
- For example, if you know the name of a Prof. but not sure which Department he is in, you will keep looking within a Tree Structure.
- It works well for things which you know well. For example if you are looking for Specifications for Maruti 800 car tyre specifications. You know you will go via Car > Suzuki > Maruti > 800 > Tyre
- These may not work for deep-information structures with similar first-level categories. This is because the first wrong choice will lead you down a complete wrong path.