Chapter 06 - Systems Analysis & Design 7 th Edition...

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Unformatted text preview: Systems Analysis & Design 7 th Edition Chapter 6 2 Chapter Objectives Describe software trends, including the concept of software as a service 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 3 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) 4 Chapter Objectives Describe the system requirements document Explain the transition from systems analysis to systems design, and the importance of prototyping Discuss guidelines for system design Describe future software development trends 5 Introduction Chapter 6 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 future trends in software development 6 Development Strategies Overview Selecting the best development path is an important decision that requires companies to consider three key topics – The impact of the Internet – Software outsourcing options – In-house software development alternatives 7 The Impact of the Internet Software as a Service – The Software and Information Industry Association (SIIA) believes that the concept of software as a service is redefining the way that companies develop and deploy their information systems 8 The Impact of the Internet Traditional vs. Web- Based Systems Development – WebSphere – Microsoft’s .NET – Many firms rely on traditional systems 9 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 • Web-based features are treated as enhancements rather than core elements of the design 10 10 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 11 11 Outsourcing 12 12 Outsourcing The Growth of Outsourcing – Traditionally, firms outsourced IT tasks as a way of controlling costs and dealing with rapid technological change – Outsourcing has become part of an overall IT strategy for many organizations 13 13 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 14...
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This note was uploaded on 03/02/2010 for the course MGMT 421-1234 taught by Professor Person during the Spring '10 term at Aarhus Universitet.

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Chapter 06 - Systems Analysis & Design 7 th Edition...

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