An interrelationship diagram is defined as a new management planning tool that depicts the relationship among factors in a complex situation. The interrelationship diagram shows cause-and-effect relationships. Its main purpose is to help identify relationships that are not easily recognizable. The main goal of line balancing is to achieve task groupings at workstations with equal time requirements to attain high labor and equipment utilization. Unbalanced lines have bottlenecks at some workstations and idle time at others. Use EdrawMax to create an interrelationship diagram for your business needs.