Explain the following tools for documenting and modeling user requirements Entity Life Histories

CPA-Quantitative-Analysis-Section-4 BLOCK RELEASE

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.

Leave a Reply

Your email address will not be published. Required fields are marked *