The process of building a draft board is exhaustive, with scouts and coaches picking apart game tape and workouts to determine which prospects are worthy of high grades. Although scouts are taught to base their evaluations primarily on game tape, the workouts help them discern some of the athletic traits that are difficult to glean from the film. Additionally, on-field drills allow evaluators to see how well some prospects project at different positions in the NFL. Lastly, workouts also help scouts separate prospects carrying similar grades at the same position. Decision makers will typically favor a better athlete at any position, with future development in mind.