L3_SAD - IntroductiontoSystemAnalysis andDesign BIT3444...

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Introduction to System Analysis and Design BIT 3444 Fall 2008 G. Alan Wang 09.04.2008 1
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efinitions Definitions stem System organized set of related components established to accomplish certain objective Systems analysis Process of studying a new system or an existing system to determine how it works and how it meets user needs Systems design rocess of developing a plan for an improved system based Process of developing a plan for an improved system, based upon the results of the systems analysis 2
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Systems Analysis and Design Why we do it? To identify and correct problems in the existing system (legacy system) To improve the existing system Outside group may mandate changes gp y g Competition can lead to change 3
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SDLC Systems Development Life Cycle Set of activities that developers use to build an information system or software system The order of various activities involved in system development Also referred to as software engineering 4
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LC SDLC 5
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reliminary Investigation Preliminary Investigation Feasibility study / System survey Determine the problem Describe the problem Understand management decisions rganizational chart Organizational chart Informal hierarchy Produces rough plan and what do to do 6
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SDLC l ii It i t i Preliminary Investigation roblem Definition Problem Definition Nature of the problem Separate problem from symptoms of problem Scope of the project udget and schedule Budget and schedule Objectives of the project What user thinks system should do 7
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SDLC Preliminary Investigation eport Report What you have found Recommendations Financially feasible Resulting Management ecision Decision Drop x a simple problem Fix a simple problem Authorize the analysis phase 8
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SDLC l i Analysis Understand the existing system Gather data nalyze data Analyze data Establish system requirements 9
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This note was uploaded on 10/12/2008 for the course BIT 3444 taught by Professor Gwang during the Fall '08 term at Virginia Tech.

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L3_SAD - IntroductiontoSystemAnalysis andDesign BIT3444...

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