Entity Life Histories
Each entity identified on the ERM contains a specific set of attributes. During the existence of each entity-occurrence these attributes are given a value that may be updated many times until eventually the whole entity-occurrence is deemed not to be of any more interest to the system and is ‗killed off‘ or archived. Thus, each entity-occurrence has a life of its own that follows a set pattern common to every occurrence of the entity it belongs to and which has to be ‗discovered‘ by the analysts. The Entity Life History (ELH) is a diagram where the possible life of each occurrence within an entity, from its creation to its deletion, is recorded.
Explain the following tools for documenting and modeling user requirements Entity Life Histories
