Wat is een step outline?

A step outline is a detailed telling of a story intended to be turned into a screenplay for a motion picture. The step outline details every scene and beat of a screenplay's story, and often has indications for dialog and character interactions. The scenes are often numbered for convenience. It is similar to a scriptment and more detailed and specific than either a treatment or an outline. It can also be an extremely useful tool for a writer working on a spec script.