For any manufacturing company, an assembly line is a mechanization in industrial production that reduces manual labor and boosts efficiency. A basic assembly line consists of a product carried by a simple conveyor belt, moving through a series of assembly stations until it is completed. More complex assembly lines include dedicated conveyors and stations along the assembly line for constructing vehicles and other complex equipment. Revolutionary assembly line manufacturing has been developed. Prior to the advent of assembly lines, industrial manufacturing was typically done by workers manually, assembling individual components. Factory production was limited. By the mid-19th century, many companies had begun to establish assembly line-type production lines in the food industry, making the process more efficient.