Can someone suggest custom taxonomies for my client?

Hi Everyone,

We have to demo spend classification to a paint industry client

What we need is types of custom taxonomies we can show them so that the end result (graphical analysis) becomes more meaningful.

We have already purchasing categories defined and we want some other custom taxonomy to pitch.

Can someone suggest any ideas?

The idea is to show the client demo capabilities without starting the requirement gathering session with them regarding their use of taxonomies.