Film directors possess ultimate creative control over their projects, be they feature-length films, documentaries, or other formats. Film directors have control over selecting scripts, input (if not total control) in the hiring of personnel, and the responsibility to exercise control over any creative and technical aspects of the film within the budget and contracts of those involved. Their role may be analogous to that of a construction project manager with regard to overseeing many disparate personnel and smaller projects to make up the whole.
Typically, film directors work with producers before committing to a film. The producer and director may set the parameters regarding finances and scheduling and discuss personnel from both creative and technical standpoints. Directors typically work from scripts, make extensive notes regarding adjustments, and then oversee casting and hiring as the film's crew comes together.
During shooting, directors must create a workplace that is conducive to creativity for all involved to produce great work. They work with camera crews and the director of photography to line up shots, and with actors and writers to adjust and improve the script. Upon completion of principal shooting, directors then work with and oversee editing and post-production work, including ensuring proper sound mixing and suggesting re-shoots if necessary.
Most film directors begin with an interest in the medium at a young age, and many pursue a degree from an accredited film school. Many also gain experience in film crews as assistants or second-unit directors. Most film directors work fairly long hours during shooting and post-production, as well as marketing and promotions upon release of the film.