上游充通大学 SHANGHAI JIAO TONG UNIVERSITY Analysis models represent user-level concepts, not actual software classes or components Classes such as Database,Subsystem, SessionManager,Network should not appear in the analysis model Domain concepts that should be represented Software classes that should not be represented in the analysis object model. in the analysis object model. Refers to how time zones UniversalTime TimeZoneDatabase are stored(design decision). Denotes to how location is TimeZone GPSLocator measured(design decision). Refers to an internal Location Userld mechanism for identifying users(design decision) Software EngineeringSoftware Engineering Analysis models represent user-level concepts, not actual software classes or components • Classes such as Database, Subsystem, SessionManager, Network should not appear in the analysis model UniversalTime TimeZone Location TimeZoneDatabase GPSLocator UserId Software classes that should not be represented in the analysis object model. Domain concepts that should be represented in the analysis object model. Refers to how time zones are stored (design decision). Denotes to how location is measured (design decision). Refers to an internal mechanism for identifying users (design decision)