5 CUA CSC 363 Dr Brad Taylor Spring 2019 Feasibility Studies Used in deciding

5 cua csc 363 dr brad taylor spring 2019 feasibility

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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Feasibility Studies Used in deciding whether proposed system worthwhile Short focused study checking if: System contributes to organizational objectives System engineering possible » Current technology » Within budget System integration possible with other systems being used
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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Feasibility Study: Implementation Basis: Information assessment (requirements) Information collection (actions) Report writing (results) Questions (people in organization) What if system wasn’t implemented? What are current process problems? How will proposed system help? What integration problems foreseen? New technology needed? What skills? What facilities must be supported by proposed system?
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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Elicitation & Analysis Requirements elicitation or discovery Discovery of: Customers’ application domain System’s services required System’s operational constraints Stakeholders: End-users Managers Maintenance engineers Domain experts Trade unions Customers
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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Requirements Analysis Problems Stakeholders Don’t know what they really want Express requirements in their own terms Different ones with conflicting requirements Organizational & political factors may influence system requirements (like?) Dynamic analysis process Requirements change New stakeholders emerge Business environment changes
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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Requirements Spiral Requirements classification and organisation Requirements prioritization and negotiation Requirements documentation Requirements discovery
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5 CUA CSC 363 Dr. Brad Taylor Spring 2019 Process Activities Requirements discovery Stakeholder interaction to discover system & domain requirements Requirements classification & organization Prioritization & negotiation Resolve requirements conflicts Requirements documentation Record & continue to next spiral round
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6 CUA CSC 363 Dr. Brad Taylor Spring 2019 Requirements Discovery Information gathering process Proposed & existing systems Distilling user & system requirements Information sources Documentation System stakeholders Similar systems specifications
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6 CUA CSC 363 Dr. Brad Taylor Spring 2019 Example: ATM stakeholders Bank customers Representatives of other banks Bank managers Counter staff Database administrators Security managers Marketing department Hardware & software maintenance engineers Banking regulators
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6 CUA CSC 363 Dr. Brad Taylor Spring 2019 Viewpoints Means to structure requirements Represent different stakeholders perspectives Multi-perspective analysis key to correctly analysing system requirements
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6 CUA CSC 363 Dr. Brad Taylor Spring 2019 Viewpoint Types Interactor viewpoints People (or other systems) interacting directly with system ATM ex: customer’s & account DB
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