IST3e Ch09 - Chapter 9 Developing Information Systems All I...

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Information Systems Today: Managing in the Digital World 9-1 9 Chapter Developing Information Systems “All I have to do is want to do it and I do it” Jesse Sullivan (on how to move his computerized artificial arms responding to his brain waves)
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Information Systems Today: Managing in the Digital World 9-2 Learning Objectives
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Information Systems Today: Managing in the Digital World 9-3 Learning Objectives
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Information Systems Today: Managing in the Digital World 9-4 Information Systems Development Systems analysis and design o Process of designing, building, and maintaining information systems o Systems analyst Early IS development o Very unstructured o Programmer skills varied
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Information Systems Today: Managing in the Digital World 9-5 Information Systems Development 1990s o Evolution from IS development as “art” to IS development as “discipline” Software engineering o Benefits Easier to train systems analysts Systems would be easier to maintain
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Information Systems Today: Managing in the Digital World 9-6 Options for Obtaining Information Systems
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Information Systems Today: Managing in the Digital World 9-7 IS Development in Action Structured process moving through steps Problem decomposition o Problems broken up into simpler, smaller pieces
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Information Systems Today: Managing in the Digital World 9-8 The Role of Users in Systems Development Process Systems users are involved in all phases of system’s development process Mutually respectful relationship necessary Organizational members need to understand the development activities well
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Information Systems Today: Managing in the Digital World 9-9 Learning Objectives
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Information Systems Today: Managing in the Digital World 9-10 Steps in the Systems Development Process Systems development life cycle (SDLC) o Arrows flowing down represent flow of information o Arrows flowing up represent the possibility of returning to a prior phase
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Information Systems Today: Managing in the Digital World 9-11 Phase 1: Systems Identification, Selection and Planning
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Information Systems Today: Managing in the Digital World 9-12 Phase 1 Identify and select potential projects o Projects critical to mission, goals, and objectives o Selection process varies among organizations Formal information systems planning process Ad hoc process o Differential focus of projects based on selection source
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Information Systems Today: Managing in the Digital World 9-13 Evaluation Criteria for Systems Projects Different criteria may be used to evaluate projects o Usually multiple criteria examined for each project
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Information Systems Today: Managing in the Digital World 9-14 Phase 2: Systems Analysis Designers gain understanding of current processes
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Information Systems Today: Managing in the Digital World 9-15 Key Elements to Development of a System 1 2 3 4
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Information Systems Today: Managing in the Digital World 9-16 Collecting System Requirements Arguably the most important activity
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This note was uploaded on 12/09/2009 for the course EST 325 taught by Professor Wan during the Spring '09 term at SUNY Stony Brook.

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IST3e Ch09 - Chapter 9 Developing Information Systems All I...

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