If I was in charge of a big budget production, I would be uncompromising on two points: 1) The screenwriter should be able to produce good rough drafts of the basic story for different genres and media. Versians written as if exclusively for a novel, a comic book, a radio drama, the stage, TV, epic poem.... Also, as if the story is a pure comedy, tragedy, mystery, action-adventure, horror, morality tale.... Quick attempts as time would permit would help ensure that the writer knows his craft and story structure and hasn't overlooked anything. 2) The screenwriter would also have to submit draft screenplays for movies already produced that might not have met their full potential, with points given for improving an already good tale. A third requirement, made possible more recently, would be for the writer to submit good fan-edits of existing films, as a strong understanding of film editing is immensely helpful in forming a screenplay. Incidently, these requirements would apply as much to the director, as a strong understanding of story structure and editing is crucial to the direction. A director must be able to help revise as much as necessary and possible on the fly as well as quicly recognize what is likely to work and what needs work.