ISOM221+Lecture+2+-+SDLC

ISOM221+Lecture+2+-+SDLC - ISOM221 Information Systems...

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Unformatted text preview: ISOM221 Information Systems Analysis and Design Lecture 2: Systems Development Life Cycle (SDLC) 1 Agenda • The fundamental systems development life cycle and its four phases • The evolution of systems development methodologie methodologies • The different roles on the project team 2 Why Should We Care? Would you buy a car that only had a 28% chance of driving off the lot with no problems? 3 Recent Significant IT Failures Company Year Outcome Hudson Bay (Canada) 2005 Inventory system problems lead to $33.3 million loss. UK Inland Revenue 2004/ 5 $3.45 billion tax-credit overpayment caused by software errors. Avis Europe PLC (UK 2004 Enterprise resource planning (ERP) system Avis Europe PLC (UK) 2004 Enterprise resource planning (ERP) system cancelled after $54.5 million spent. Ford Motor Co. 2004 Purchasing system abandoned after deployment costing approximately $400 M Hewlett-Packard Co. 2004 ERP system problems contribute to $160 million loss. AT&T Wireless 2004 Customer relations management system upgrade problems lead to $100M loss 4 Systems Analysis and Design • Systems analysts perform analysis and design based upon: – Understanding of organization’s objectives, structure and processe structure and processes – Knowledge of how to exploit information technology for advantage 5 Systems Analysts • Systems analyst – a spet who studies the problems and needs of an organization to determine how people, data, processes, and information technology can best accomplish improvements for the business • A programmer/analyst (or analyst/programmer ) includes the responsibilities of both the computer programmer and the systems analyst. • A business analyst focuses on only the non- technical aspects of systems analysis and design. 6 The Systems Analyst as a Facilitator 7 Skills Needed by the Systems Analyst • Working knowledge of information technology • Computer programming experience and expertise • General business knowledge • General problem-solving skills • Good interpersonal communication skills • Good interpersonal relations skills • Flexibility and adaptability • Character and ethics 8 Systems Development Life Cycle Planning Analysis Design Implementation 9 SDLC • Each phase consists of steps that lead to specific deliverables • The system evolves through gradual refinemen refinement • Once the system is implemented, it may go back into a planning phase for its next revision, a follow-on system, or maintenance releases 10 Processes and Deliverables Process Product Planning Project Plan Process Product Planning Project Plan Analysis Design Implementation System Proposal System Specification New System and Maintenance Plan Analysis Design Implementation System Proposal System Specification New System and Maintenance Plan 11 Phase I: Planning • This phase is the fundamental process of understanding why an information system should be built The Planning phase will also determine how • The Planning phase will also determine how...
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This note was uploaded on 12/22/2010 for the course ISOM ISOM221 taught by Professor Sheunhhee during the Spring '09 term at HKUST.

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ISOM221+Lecture+2+-+SDLC - ISOM221 Information Systems...

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