Information Systems Development and Acquisition
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| Customised Software vs. Off-the-shelf Software | Customised and problem specific vs packaged
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| 4 Possible Sources For a New IS | • Build IS
• Buy pre-packaged system
• Outsource development to 3rd party
• End-user development
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| Systems Analysis and Design | Process of designing, building and maintaining IS
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| 4 Phases of Systems Development Life Cycle (SDLC)(Figure 9.5) | • Planning and Selection
• Analysis
• Design
• Implementation and Operation
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| Evaluation Criteria for Systems Projects | • Strategic Alignment
• Potential benefits
• Potential costs and resource availability
• Project size and duration
• Technical difficulty and risks
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| 4 Techniques for Requirements Collection | • Interviews
• Questionnaires
• Observations
• Document analysis
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| Critical Success Factors (CSF) and it's strength vs. weakness | A key area that an organisation must do well at to ensure success for the organisation. Easy to understand, but can be too generalised for complex situations
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| Joint Application Design (JAD) | Users meet with the analyst in a group meeting to agree on system requirements. Group involvement benefits vs group involvement drawbacks.
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| 3 Elements of IS Design | • Human-Computer Interface (HCI)
• Database and Files
• Processing and Logic
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| 3 Types of Software Programming and Testing | • Developmental
• Alpha
• Beta
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| System Conversion, Documentation, Training and Support | Process of decommissioning to current systems and installing the new one.
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| 4 Types of System Maintenace | • Corrective
• Adaptive
• Perfective
• Preventative
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| Patch Management System | Use of the internet to check the software vendor for available fixes, patches and updates
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| Prototyping | Trial and error approach for discovering how a system should operate
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| 4 Phases of Rapid Application Development (RAD) | • Requirements Planning
• User Design
• Construction
• Move to the new system
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| Object-Oriented Analysis and Design (OOA&D) | Use of common modules (objects) which are created and reused rather than data and processes
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| 4 Reasons Not to Develop System In-House | • Limited skill set in staff
• Limited staff
• Overworked staff
• Problems with performance of IS staff
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| 5 Steps for External Acquisition of IS | • Systems planning and selection
• Systems analysis
• Development of a request for proposal
• Proposal evaluation
• Vendor selection
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| 7 Reasons to Outsource IS Devlopment | • Cost + quality concerns
• Probelms in IS performance
• Supplier pressures
• Simplifying, downsizing, reengineering
• Financial factors
• Organisational culture
• Internal frustrations
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| End-user Development | Users who actually are going to use the systems are the ones who also develop it
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| 4 Benefits of End-user Development | • Cost
• Longer development time
• Slower modification
• Reduce work overload
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| 5 4th Generation Development Tools | • Personal computer tools
• Query language/reporting generators
• Graphics generators
• Decision support/modeling tools
• Application generators
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