Best Practices for Designing Faceted Search Filtersn
http://new.uxmatters.com/mt/archives/2009/09/best-practices-for-designing-faceted-search-filters.php

Nudelman, Greg
UXmatters
2009

Abstract:

Recently, Office Depot redesigned their search user interface, adding attribute-based filtering and creating a more dynamic, interactive user experience. Unfortunately, Office Depot’s interaction design misses some key points, making their new search user interface less usable and, therefore, less effective. That’s the bad news. The good news is that the Office Depot site presents us with an excellent case study for demonstrating some of the important best practices for designing filters for faceted search results.