A better RAVePlan Ideally, RAVePlan could be folded into the interactive RAVE facility (described later), so that documents are allocated dynamically and incrementally, maintaining a nearly consistent density on all queries. The experimenters could then push the experiment alternately in the directions of higher density or larger candidate-document sets. In its current implementation, however, RAVePlan requires that we predetermine the list of documents that each subject will see.