Game Development Dictionary
Entity Relationship Management
Managing the relationship of game design entities (see Entity). As the number of entity types in a game increases, the relationships between them increases geometrically, so for instance in a game with 3 entity types there are 3 possible relationships. For a game with 4 entity types there are 12 and so on. For games such as large adventure games where there may be many different entities, it will become necessary to manage this in some way, by creating standard interactions, or reducing the number of entities available in any one scene.