The document reviews methodologies used to modify belt conveyor designs and reduce failures, maintenance costs, and accidents. It discusses modifications to the drive mechanism, drum and pulley designs, belt design, energy efficiency, friction, inspection methods, operation and maintenance practices, and fire safety. Common failures include fatigue cracks in welded drums, shell fractures, and pulley shaft failures. New technologies aim to improve the starting torque, control braking systems, and optimize operations for cost and efficiency. Proper belt, drum, and pulley designs along with maintenance and safety training can improve reliability and productivity of belt conveyor systems.