Use EdrawMax to create an interrelationship diagram for your business needs. An interrelationship diagram (ID) offers a simple way of visualizing how various problems are connected and may help determine whether or not problems are causing other problems. The following department store interrelationship diagram carried out on the role of the store department, and its relationship with other departments in a manufacturing company will be of special benefit to store officials or personal and purchasing officers who wish to know how important the role of store department in a manufacturing organization.