As a Discovery & Systems Librarian, I monitor the relevance ranking configuration and the boosting configuration in blended search profiles on our site. It will be tremendously helpful if the positions of selected records in search result list are tracked. For example, higher positions says the relevance ranking is working well than lower in the list.
Selecting a record includes actions such as clicking on permalink, clicking on quick links, clicking on any OpenURLs, e-mail, citation, print, save to e-shelf, and for physical items, request item from the library.