CH02 - Systems Analysis and Design in a Changing World,...

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2 Systems Analysis and Design in a Changing World, Fifth Edition
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2 Learning Objectives Explain the purpose and various phases of the systems development life cycle (SDLC) s Explain when to use an adaptive approach to the SDLC in place of a more predictive traditional SDLC Explain the differences between a model, a tool, a technique, and a methodology Describe the two overall approaches used to develop information systems: the traditional method and the object-oriented method Systems Analysis and Design in a Changing World, 5th Edition 2
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2 Learning Objectives (continued) L Describe the key features of current trends in systems development: the Unified Process (UP), Extreme Programming (XP), and Scrum Explain how automated tools are used in system development Systems Analysis and Design in a Changing World, 5th Edition 3
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2 Overview System development project Planned undertaking with fixed beginning and end Produces desired result or product Can be a large job with thousands of hours of effort or a small one-month project Systems Analysis and Design in a Changing World, 5th Edition 4
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2 The Systems Development Lifecycle (SDLC) ( Systems development life cycle (SDLC) S Provides overall framework for managing systems development process Two main approaches to SDLC Predictive approach – assumes project can be planned out in advance Adaptive approach – more flexible, assumes project cannot be planned out in advance All projects use some variation of SDLC Systems Analysis and Design in a Changing World, 5th Edition 5
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2 Choosing the Predictive vs. Adaptive Approach to the SDLC Systems Analysis and Design in a Changing World, 5th Edition 6 Figure 2-1
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2 Traditional Predictive Approach to the SDLC Project planning – initiate, ensure feasibility, plan schedule, obtain approval for project Analysis – understand business needs and processing requirements Design – define solution system based on requirements and analysis decisions Implementation – construct, test, train users, and install new system Support – keep system running and improve Systems Analysis and Design in a Changing World, 5th Edition 7
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2 Information System Development Phases Systems Analysis and Design in a Changing World, 5th Edition 8 Figure 2-2
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2 SDLC and Problem Solving Similar to problem-solving approach in Chapter 1 Organization recognizes problem (project planning) O Project team investigates, understands problem and solution requirements (analysis) s Solution is specified in detail (design) S System that solves problem is built and installed (implementation) ( System used, maintained, and enhanced to continue to provide intended benefits (support) p Systems Analysis and Design in a Changing World, 5th Edition 9
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2 “Waterfall” Approach to the SDLC Systems Analysis and Design in a Changing World, 5th Edition 10 Figure 2-4
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2 Modified Waterfall Approach with Overlapping Phases Systems Analysis and Design in a Changing World, 5th Edition 11 Figure 2-5
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This note was uploaded on 04/08/2010 for the course BUSINESS 4456 taught by Professor Blackwell during the Spring '10 term at West Liberty.

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CH02 - Systems Analysis and Design in a Changing World,...

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