Who's Who On A Movie Crew

A movie crew requires so many different jobs because there are so many components that go into a shot, including lighting, makeup, cinematography, and costumes. Each department often has several people within it to make the production go as smoothly as possible, and those people are responsible for delivering on their end. Also there are jobs that don't even involve touching camera equipment, like production assistants and producers, however they're still vital to the whole process. I've never heard of a Unit Production Manager, whose role is to break down scripts, manage schedules, and oversee all aspects of production like set construction. This role seems interesting because it doesn't appear to require the same technical skills that most jobs on set do, although it must be stressful to manage everything going on behind the scenes.