Testing Search for Relevancy and Precision

Despite the fact that site search often receives the most traffic, it’s also the place where the user experience designer bears the least influence. Few tools exist to appraise the quality of the search experience, much less strategize ways to improve it. But relevancy testing and precision testing offer hope. These are two tools you can use to analyze and improve the search user experience.
Original article from http://www.alistapart.com/articles/testing-search-for-relevancy-and-precision/