Faceted Navigation

Allowing users to narrow down results by applying multiple filters based on object attributes.

The Specific Question

How do users drill down into 10,000 products without a rigid hierarchy?

Worked Example: Buying a Laptop

Facets: Brand, RAM, Screen Size, Price. Users can select "Apple" and "16GB RAM" simultaneously. This requires the underlying metadata to be perfectly structured.

Common Mistakes

Displaying empty facets (0 results).
Not allowing multi-select within a facet (e.g., unable to select both "Red" and "Blue").