Answer: Assembly lines carry out operations in a sequence so that the product gets completed in stages. Since the workflow has to be uniform and operations may require different periods for completion, the necessity of line balancing is felt. Capacities at workstations are so adjusted that a product takes approximately the same amount of time during each stage in the process of assembly. The core part of line balancing involves establishing the suitable cycle time and balancing the individual work stations in terms of the cycle time.