The classical model of information retrieval, as described by Marcia Bates1 is as follows.

Contrast to the BerryPickingModelOfInformationRetrieval.
Footnotes:
1. Marcia Bates. THE DESIGN OF BROWSING AND BERRYPICKING TECHNIQUES FOR THE ONLINE SEARCH INTERFACE. http://www.gseis.ucla.edu/faculty/bates/berrypicking.html