This multivalued ER diagram schema is a visual representation of various entities within a system and how they interact with one another. Although data modeling became necessary in the 1970s, no standard method for modeling databases or business processes existed. Even though many solutions were proposed and discussed, none were widely adopted. Multivalued attribute ER diagram schema is used in software engineering during the planning stages of a software project. They aid in the identification of various system elements and their interrelationships. It is frequently used as the foundation for data flow diagrams, or DFDs as they are more commonly known.