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19 Cards in this Set
- Front
- Back
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Systems investigation
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first step in develop of new system. its purpose is to determine whther the ojectives are satisfying the goals of the organization..so u try to uncover problems and scope of them
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Feasibility analysis
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investigates the problem to be solved or opportunity to be met..it involves technical, economic ,legal,Sschedule and operational feasibilities
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Technical feasibility
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concerned with if hardware, software can be acquired or developed.
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Economic feasibility
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if projectmakes financial sense and predicted benefits will offset costs and time needed to obtain them
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Legal feasibility
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whether laws or regulations may prevent systems development project
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Operational Feasibility
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measure of whther or not the project can be put into action or operation...included both physical and motivaltional considerations
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Schedule feasibility
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determines if project can be completed in a reasonable amount of time...meeting time requirements
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Steps for large organization to evaluate computer system
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1. Collecting appropriate data
2. Analyzing the data 3. Determining new sysetm requirements and project priorities |
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Data Collection requires
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1. Interviews
2. Direct observation 3. Outputs 4. Questionnaires 5. Other collection methods |
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Three steps of data collection
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1. Identify data sources
2. Data Collection 3. Follow-up and clarification |
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Two types of interviews
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Structure interview: question written in advance
Unstructures: questions not written in advance |
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Direct observation
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one or more membersof analysis team observe existing system in action
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Outputs
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manual and computerized from existing system are collectede.g previous bills sent
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Other data collection methods
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telephone calls, simulating events, taking random samples
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Data Analysis
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raw data is not useful so two tools are used that are:
1. Application flowcharts 2. CASE tools |
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Requirements analysis
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determine user, stakeholer, organizational needs
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Tool for requirement analysis
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1. Asking directly (best for stable systems with users or stakeholders with a clear understanding of systems functions)it usu fails as individuals dont know what they want or need
2. Joint Application developmet 3. Rapid application development |
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JAD
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Joint application deelopment: used in place of traditional data collection and requirements analysis...involves group meetings to define requirements of new system...meeting of problem holders and solution providers
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RAD
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determine and define systems requirements of a group...it combines JAD...INVOLVES PROTYPINg and then presenting it to the managers after which it is refined and analysed.
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