
Simple product listings or navigation hierarchies are easily overextended with the hundreds and thousands of different views and needs users are trying to focus on their prefered information.
Therefore it is a strategicly smart step to create platforms which offer these multiple ways for the end user to focus and narrow down on the prefered information.
But what's the right method of doing so? Developing a faceted classification is certainly one solid way. William Denton has published this terrific description called "How to Make a Faceted Classification and Put It On The Web" which describes the most important steps including analysis work, basics thoughts behind the method and finaly the imlementations.
It's worth reading. What are your comments on faceted classification and how important is it for you?