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14 Cards in this Set
- Front
- Back
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Why Make A New System? |
The current system is not suitable for purpose. Technological developments may have made the current system redundant. The current system may be too inflexible or expensive to maintain |
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Feasibility Study
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Legal, Economic, Technical, Time-Frame, Operational
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Analysis
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Interviewing staff at different levels of the organisation, Examining existing business and system documents, Using questionnaires to obtain feedback from staff, Observe current procedures first hand. Current inputs, outputs, input and output designs, data flow diagrams, data structures.
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Design
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Hardware specifications, Software specifications, The user interface, Inputs/Outputs of the system, A testing and evaluation strategy. inputs, outputs, input and output designs, data flow diagrams, data structures for new system.
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Programming
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The solution designed is made
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Testing
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Alpha Testing:The developers test the system to eliminate any obvious problems.
Beta Testing:The product is released early to a number of customers who report any problems they find. White box: Black Box: Acceptance: |
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Installation
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Direct changeover, Parallel conversion, Phased conversion
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Maintenance
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It is required for many reasons such as, errors in the software, new user requirements and new hardware developments. This is the most expensive part of the life cycle
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OS Single User
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one programme at a time (simple manufacturing environments)
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OS Multitasking
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enables two or more programmes to held in memory
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OS Multi-User
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More than one person can communicate the server at a time. |
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OS Batch
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runs beginning to end without intervention from user all in one go. Payroll.
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OS Real Time Systems
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Used when data must be processed immediately
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OS Knowledge Based Systems
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attempt to replicate human knowledge. User interface, database of knowledge. |
