5.0 Lecture 3 Feasibility Study.pdf - The Traditional SDLC:...

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|Business Systems Analysis & DesignProjectdefinitionFeasibilitystudy7/2/2021The Traditional SDLC: Feasibility Study
|7/2/2021BBT 21012Learning OutcomesAt the end of the lecture students should:1.Carry out a feasibilitystudy of an identifiedproblem.2.Write a feasibility study report.Is there a need for a newsystem?Can a new system bejustified?If so, what are the options?
|Feasibility StudyIn case the system proposal is acceptable to themanagement, the next phase is to examine thefeasibility of the system.The feasibility study is the test of the proposedsystem in the light of:1.Its workability, meeting user’s requirements,2.Effective use of resources and of course,3.Cost effectiveness.7/2/2021Business Systems Analysis & DesignThe SDLC Phases: Feasibility Study
|Business Systems Analysis & DesignWhat Feasibility Study Does ILooks at the existing system in detailClarifies its intended requirementsIdentifies its problemsIdentifies new requirements that have since arisenCarries out investigation into some alternative solutionsCarries out cost/benefit analyses of the alternativesRecommends an alternative orsticks with old system7/2/2021
|Business Systems Analysis & DesignTypes of Feasibility StudiesLegal:Doesn’t infringe on any lawsOrganizational (socially): Acceptable toorganization and staff/usersTechnical:Can be supported by availabletechnology and expertiseEconomic:Affordable i.e. expenses justifiableOperational:Can be used by end users7/2/2021
|Economic Feasibility: EstimationFour major variables to consider:1.Time,2.Requirements,3.Resources (cost, labour, materials, infrastructure)4.Risks.Unexpected changes in any of these variables willadversely impact an outcome of the project.Making good estimates of time and resources for aproject is crucial.7/2/2021Business Systems Analysis & Design
|Cost EstimationTwo major approaches:Top-down approach: start with the management’sexpectations on the range of costs. Then, figureout what you can deliver for those numbers.Bottom-up approach: Cost is derived by accumulatingestimates from the people responsible for variouscomponents.7/2/2021Business Systems Analysis & Design
DescriptionAdvantageDisadvantageExpert JudgmentsUsing experts in bothsoftware development and theapplication domain to predictsoftware costs.Relatively cheap estimationmethod.Accurate if experts havedirect experience of similarsystems.Very inaccurate if there areno experts!Estimation byAnalogyUsing the cost of a similarproject in the sameapplication domainAccurate if project dataavailableImpossible if no comparableproject has been tackled.Needs systematicallymaintained cost databaseParkinson's LawUsing any available resources.

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Term
Spring
Professor
rashidian
Tags
Net Present Value, Business Systems Analysis Design

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