It covers the basic ideas and issues of the production. Main characters, locations and story angles are included. In part, its purpose is to sell the proposal to financial backers and to major stars. Treatments should be attention-getting and interesting to read. They are written in the present tense, and often read like a short story.
Treatments cover the full story sequence.
Some sources say that there is typically one treatment page for every two script pages. In television production a program proposal plays a similar role.