Understanding and Visualizing Solr Explain Information by Rafal Kuc.
From the description:
This talk and presentation by Rafal Kuc, a DZone MVB, is about how to use, understand and visualize Solr ‘explain’ information—essential output from Solr that lets you better tune and debug your search application. In the talk, I’ll show the free software that is in development right now, that visualize Solr ‘explain’ information, such as how the score of the documents were counted, from what it is taken, how it was counted,which tokens mattered the most, and so on.
Session slides are also available.
Be forewarned, the proposed “explain” application has pie charts. 😉