Pre-production—Preparations are made for the shoot, in which cast and film crew are hired, locations are selected, and sets are built. The Development stage, in which the ideas for the film are created, rights to books/plays are bought, etc., and the screenplay is written, occurs before Pre-production.
Production—The raw elements for the finished film are recorded.
Post-Production—The film is edited; production sound (dialogue) is concurrently (but separately) edited, music tracks (and songs) are composed, performed and recorded, if a film is sought to have a score; sound effects are designed and recorded; and any other computer-graphic 'visual' effects are digitally added, all sound elements are mixed into "stems" then the stems are mixed then married to picture and the film is fully completed ("locked").