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Chap 7 - Systems Analysis and Design 8th Edition Chapter 7...

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Systems Analysis and Design 8th Edition Chapter 7 Development Strategies
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Chapter Objectives Describe the concept of Software as a Service Define Web 2.0 and cloud computing Explain software acquisition alternatives, including traditional and Web-based software development strategies Describe software outsourcing options, including offshore outsourcing and the role of service providers 2
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Chapter Objectives Explain advantages and disadvantages of in-house software development Explain cost-benefit analysis and financial analysis tools Explain the differences between a request for proposal (RFP) and a request for quotation (RFQ) Describe the system requirements document 3
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Chapter Objectives Explain the transition from systems analysis to systems design, and the importance of prototyping Discuss guidelines for systems design Describe software development trends 4
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Introduction Chapter 7 describes the remaining activities in the systems analysis phase The chapter also describes the transition to systems design, prototyping, and systems design guidelines The chapter concludes with a discussion of trends in software development 5
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The Impact of the Internet Software as a Service Software as a Service (SaaS) 25% of all new business software will be deployed as a service by 2011, while the value of the SaaS industry will grow to $40 billion 6
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The Impact of the Internet Traditional vs. Web-Based Systems Development Traditional development System design is influenced by compatibility issues Systems are designed to run on local and wide- area company networks Systems often utilize Internet links and resources, but Web-based features are treated as enhancements rather than core elements of the design 7
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The Impact of the Internet Traditional vs. Web-Based Systems Development Web-based development Systems are developed and delivered in an Internet-based framework such as .NET or WebSphere Internet-based development treats the Web as the platform, rather than just a communication channel Web-based software usually requires additional layers, called middleware 8
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The Impact of the Internet Looking to the Future: Web 2.0 and Cloud Computing The Web 2.0 platform will enhance interactive experiences including wikis and blogs, and social networking applications 9
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Outsourcing The Growth of Outsourcing A firm that offers outsourcing solutions is called a service provider Application service providers (ASP) Internet business services (IBS) Also called managed hosting 10
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Outsourcing Outsourcing Fees A fixed fee model uses a set fee based on a specified level of service and user support A subscription model has a variable fee based on the number of users or workstations that have access to the application A usage model or transaction model charges a variable fee based on the volume of transactions or operations performed by the application 11
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Outsourcing
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