Information Systems Analysis and Design csc340 A Case Study The International Film Video Store 2004 John Mylopoulos Case Study 1 Information Systems Analysis and Design csc340 The International Film Video Store This store was founded by a couple of friends who like international cinema The store has been located near one of Toronto s repertoire theatres and has been in operation for four years Unfortunately the store is barely scrapping a living because of insufficient rentals especially during the summer when the neighbouring repertoire theatre is closed Problem Increase video rentals 2004 John Mylopoulos Case Study 2 Page Information Systems Analysis and Design csc340 Where Do We Start How do video rentals happen Could they happen differently tactical analysis Rent Video Browse Collection Select Video Deliver Return Video Pay Physically Physically Customer Electronically Electronically Physically Electronically Courier Electronically 2004 John Mylopoulos Case Study 3 Information Systems Analysis and Design Bring Store Closer to More csc340 Increase Video Rentals Low Price Web Based Rentals Electr Web Based Rentals Electr Courier Open Many Stores Phys Strategic Analysis Broaden Collection Enrich Collection Profitable Competitive Price Operational Cost Market Niche Competitive Advantage Development Cost Cost 2004 John Mylopoulos Case Study 4 Page Information Systems Analysis and Design csc340 What Are the Leading Alternatives Electronic solution no physical store higher development costs lower operational costs Electronic solution courier service OK for users who rent in bulk Broaden collection to include more foreign languages need selectors suppliers Deliver videos to N e g 10 locations around Toronto customers can pick up drop off videos there 2004 John Mylopoulos Case Study 5 Information Systems Analysis and Design csc340 Choose an Alternative Suppose we decide to recommend the last alternative This means that a customer chooses videos from a web based system these videos are delivered to the location closest to her she returns the videos to that location and they are sent back to the video store warehouse 2004 John Mylopoulos Case Study 6 Page Information Systems Analysis and Design csc340 RSD Describe Functional and Non Functional Requirements Describe each functional requirements in English Describe each non functional requirement in English Describe data to be managed by the system Organize and number both functional and nonfunctional requirements so that they can be referred to later on Trace each functional requirement Indicate the strength of each requirement e g very strong must have weak could skip if things fall behind 2004 John Mylopoulos Case Study 7 Information Systems Analysis and Design csc340 RSD NFRs Security and privacy Reliability Performance throughput response time Relate each of these to the UML diagrams you include in appendices 2004 John Mylopoulos Case Study 8 Page Information Systems Analysis and Design csc340 RSD System Interfaces Data I O Specify in the RSD Interface with courier DB data exchanged Interface with credit card co DB data exchanged Data to be managed by the system customers rental items rentals 2004 John Mylopoulos Case Study 9 Information Systems Analysis and Design csc340 Modeling in UML Business Processes We start with the business processes to be supported by the system use state diagrams or activity diagrams to model them Rent Deliver Pickup Return ReturnToStore Remind Rent in detail includes payment authorization with credit card company Deliver once a day in detail includes communication with courier database Return to repository in detail includes communication with courier database Remind customer about overdue videos 2004 John Mylopoulos Case Study 10 Page Information Systems Analysis and Design csc340 Use Cases Use cases correspond roughly to the functional requirements of the system Customer use cases browse select choose pay Employee use cases list of videos for each location each day list of videos from each location each day remind customer electronically charge delinquent customer Manager use cases Report at the end of each week Report on dormant customers once every 6months Systems person use cases start system get report on failure 2004 John Mylopoulos Case Study 11 Information Systems Analysis and Design csc340 Documenting Use Cases Describe each use case in English including the steps required I O Model each use case in terms of one or more sequence diagrams normal case exceptional cases 2004 John Mylopoulos Case Study 12 Page Information Systems Analysis and Design csc340 What Kinds of Objects Are We Talking About RentalItem Rental Film VideoCp DVDCp Customer Use CL to model constraints pre post conditions to specify Business rules pre post conditions for operations 2004 John Mylopoulos Case Study 13 Page
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