Chapter+6+-+1

Chapter+6+-+1 - Fact-Finding Techniques for Requirements...

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Fact-Finding Techniques for Requirements Discovery Chapter 6
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Introduction to Requirements Discovery Requirements Discovery – The process and techniques used by Systems Analysts to identify or extract system problems and solution requirements from the user community. System Requirement – What the Information System must do or a property that it must have. Also called a Business Requirement .
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Functional vs. Nonfunctional Requirements Functional Requirement - something the Information System must do Nonfunctional Requirement - Property or quality the system must have Performance Security Costs
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Results of Incorrect Requirements The system may cost more than projected. The system may be delivered later than promised. The system may not meet the users’ expectations and they may not to use it. Once in production, costs of maintaining and enhancing the system may be excessively high. The system may be unreliable and prone to errors and downtime. Reputation of IT staff is tarnished as failure will be perceived as a mistake by the team.
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Relative Cost to Fix an Error Costs increase the later the issue is discovered.
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Criteria for System Requirements Consistent – Not conflicting or ambiguous. Complete – Describes all possible system inputs and responses. Feasible – Can be satisfied based on the available resources and constraints. Including Technological Capabilities. Required
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This note was uploaded on 04/17/2008 for the course M&IS 24060 taught by Professor G.dehondt during the Spring '08 term at Kent State.

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Chapter+6+-+1 - Fact-Finding Techniques for Requirements...

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