Conversation so far:
Who is in charge of all the ongoing aspects of the film
The producer is in charge of all the ongoing aspects of a film.
what are examples of the ongoing aspects of a film a producer is in charge of
Producers plan and coordinate various aspects of film production, such as selecting the script; coordinating writing, directing, and editing; and arranging financing.

Question: what happens during the 'discovery stage'
Self-contained rewrite: what happens during the 'discovery stage' for producers