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ISPP Chapter 9
Information Systems Development and Acquisition
Question | Answer |
---|---|
Customised Software vs. Off-the-shelf Software | Customised and problem specific vs packaged |
4 Possible Sources For a New IS | • Build IS • Buy pre-packaged system • Outsource development to 3rd party • End-user development |
Systems Analysis and Design | Process of designing, building and maintaining IS |
4 Phases of Systems Development Life Cycle (SDLC)(Figure 9.5) | • Planning and Selection • Analysis • Design • Implementation and Operation |
Evaluation Criteria for Systems Projects | • Strategic Alignment • Potential benefits • Potential costs and resource availability • Project size and duration • Technical difficulty and risks |
4 Techniques for Requirements Collection | • Interviews • Questionnaires • Observations • Document analysis |
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 |
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. |
3 Elements of IS Design | • Human-Computer Interface (HCI) • Database and Files • Processing and Logic |
3 Types of Software Programming and Testing | • Developmental • Alpha • Beta |
System Conversion, Documentation, Training and Support | Process of decommissioning to current systems and installing the new one. |
4 Types of System Maintenace | • Corrective • Adaptive • Perfective • Preventative |
Patch Management System | Use of the internet to check the software vendor for available fixes, patches and updates |
Prototyping | Trial and error approach for discovering how a system should operate |
4 Phases of Rapid Application Development (RAD) | • Requirements Planning • User Design • Construction • Move to the new system |
Object-Oriented Analysis and Design (OOA&D) | Use of common modules (objects) which are created and reused rather than data and processes |
4 Reasons Not to Develop System In-House | • Limited skill set in staff • Limited staff • Overworked staff • Problems with performance of IS staff |
5 Steps for External Acquisition of IS | • Systems planning and selection • Systems analysis • Development of a request for proposal • Proposal evaluation • Vendor selection |
7 Reasons to Outsource IS Devlopment | • Cost + quality concerns • Probelms in IS performance • Supplier pressures • Simplifying, downsizing, reengineering • Financial factors • Organisational culture • Internal frustrations |
End-user Development | Users who actually are going to use the systems are the ones who also develop it |
4 Benefits of End-user Development | • Cost • Longer development time • Slower modification • Reduce work overload |
5 4th Generation Development Tools | • Personal computer tools • Query language/reporting generators • Graphics generators • Decision support/modeling tools • Application generators |