Table of Contents - DSpace

Use CaseGoal in ContextPreconditionSuccess End ConditionFailed End ConditionPrimary ActorTriggerInitiate user session.User successfully logged on into the system.The user has an account existed in the database.User successfully logged on into the system.User failed to log on into the system.User of Web-based Colour Communication System.The actor executes “log in” function.Basic Flow of EventsActor Action1. User selects “Log in” function.3. User enters username and passwordSystem Response2. System displays “Log in” module.4. System authenticates user’s credentialand log him into the system by creating auser session for him.Figure 4.2: Textual description for use case scenario “Initiate user session”Use CaseGoal in ContextPreconditionSuccess End ConditionFailed End ConditionPrimary ActorTriggerTerminate user session.User successfully ended his session and logged out fromthe system.The user has an account existed in the database and haslogged on into the system with a action user session.User successfully logged out from the system.User failed to log out from the system.User of Web-based Colour Communication System.The actor executes “Log out” function.Basic Flow of EventsActor Action1. User selects “Log out” function.System Response2. System ends user’s current session andlogs him out from the system.Figure 4.3: Textual description for use case scenario “Terminate user session”65