When it comes to nearly everything in life, less is more. The same is true for building taxonomies – keep it simple.
Whether you’re building a taxonomy around a department, document or process, you should always aim to make it easy for users to adopt. Create fields that only require small, critical pieces of information to be filled. If an employee needs to fill out over twenty data fields, there’s a good chance they aren’t going to do it. Plus, it creates a process that is nearly as time-consuming as the old manual method. Stick with what’s required, and make some extras optional, but don’t go overboard.
When it comes to gathering quality metadata, you should always take what you can get.