System Analysis Essay Example | Topics and Well Written Essays - 2000 words

System Analysis - Essay Example Use cases can be used for almost every kind of project for the reason that they are cooperative in providing information about planning related issues and requirements of the project. Thus, in the beginning of a project the majority use cases should be defined, however as the project carries on more capacity turns out to be noticeable. In simple words, the basic purpose of use case diagram is to recognize the major elements and procedures that make up the system. These major elements are recognized as "actors" and the procedures are known as "use cases." In this scenario, the use case diagram demonstrates which actors relate with each use case (Braun et al., 2011) and (Chitnis et al., 2003). Use Case Diagram of WBF Ltd rental system B- Use case description The process of defining the overall use case along with main aspects of interactions between the system and the users is known as use case description. In the scenario of system development, the main purpose of use case description is to explain overall procedures in addition to aspects those are demonstrated in the diagram so that the viewer can have better overview of the interactions and processes (Sommerville, 2004) and (Pressman, 2001). Rental Process Use case description Use case Description This use case describes the process of film rental for customer. In this scenario a customer places a request for the film. In case film is available then customer provides his personal details. After recording customer details system stores the system film rental information and processes payment information. After payment processing system delivers the receipt to the customer. Precondition/s In order to process film rental request there is a precondition for the availability of the film in stock. If the required film is available in the film stock then the system processes the film rental request. Post condition/s For the successful completion of the overall rental process, there is a need to implement a proper ap proach for processing the payment of customer. After receiving payment from the customer, system carries out the rental requests as well as provides it by saving customer and film information and delivering the payment receipt. Steps I have outlined below some of the main steps for the overall process of film rental case: Customer requests for renting a film Customer selects the desired movie Customer provides personal details Customer pays the required cost of film he wants to take on rent System saves information System delivers receipt Assuming that the customer has chosen the film and it is available to rent out, produce a step-by-step use case description for the use case ‘Check out Film’ in WBF Ltd rental system using an appropriate template/format that should include: C- Role of class diagram Class diagrams are the foundation of object-oriented design and analysis. Class diagrams demonstrate the classes of the main system that we are going to develop, their invol vements (comprising aggregation, inheritance as well as relationship), and the characteristics and processes of the classes. Moreover, class diagrams are used to carry out a broad range of functions, such as together domain/abstract modeling and comprehensive design