Manual assembly lines are used to assemble consumer products where demand is high or medium. The assembly process involves dividing the total work into small tasks performed at sequential workstations by one or more workers. Products are assembled on these lines if they are identical or similar, and the work can be broken down into elements that may be too difficult to automate. Key considerations for manual assembly lines include line pacing to maintain production rates, balancing work assignments across stations, and designing products and components for ease of assembly.