Production
The stage where all the scenes are filmed. They are planned out before in pre-production. Each scene will be filmed multiple times and so will each shot even if it is just a 2 second shot. Its important that the pre-production was done well enough as it will show how well the filming is. This is also where it is made sure that all the shots are done correctly and al the necessary filming is done.
Distribution
Making the film viewable by the audience. Usually done by the professional film distributor, they would decide the marketing strategy for the media for the film and how it gets released and advertised, and who sets the release date. It would be distributed thought movie theatre, t.v or even straight to DVD.
Exhibition
The Premier and important stage used to launch the film.