Pre-production involves planning all elements of a production before principal photography or performance begins. It includes developing the concept, writing the script or storyboard, casting crew members, scouting locations, securing equipment, props, wardrobe, and scheduling. Pre-production allows filmmakers to foresee and prevent problems, be efficient with time and resources, and have a clear plan and agenda to acquire necessary funding. Key pre-production steps include script writing, storyboarding, casting, location scouting, and securing equipment.