4.3.9 - SDLC - Systems Evaluation
- Created by: Annie
- Created on: 13-05-13 18:27
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- Systems Evaluation
- This is a key part of developing future systems successfully, by learning from the good and bad points of developing the current system
- Usually takes place after the new system has been used for a while
- Criteria for systems evaluation (not definitive)
- How well does the system match the original user requirements?
- Ease of use
- Does the system produce useful information promptly?
- Is the new system running smoothly?
- Was the testing effective?
- Was there much corrective maintenance?
- Is security effective?
- Tools for compiling an evaluation report
- Quantitative Tests
- For example, whilst verbal evidence of "ease of use" may be interesting, it cannot be aggregated. So a scale of 1-5 to determine satisfaction levels may be more helpful
- Measurable item
- Error Logging
- All errors noted need to be recorded in a log so they can be analysed by type and a summary provided
- Corrective maintenance
- All errors noted need to be recorded in a log so they can be analysed by type and a summary provided
- Interviews
- Interviews with key personnel can be used to determine how effective the system has been in meeting user requirements
- Questionnaires
- Whilst interviews are with a small number of people, questionnaires can be used to ensure all users have a say in the evaluation process
- Quantitative Tests
- Methods of avoiding post implementation costs
- Costs can include:
- Training for the initial system
- Adaptive, Corrective and Perfective changes
- A log of these costs can help in reducing such costs for future systems.
- Some of these costs are inevitable to some extent, so eliminating them is not possible
- Training
- Use CBT Training (computer based training)
- Adaptive
- Make it easy to change
- Don't want to be employing a programmer to edit and disrupt the system
- Make it easy to change
- Costs can include:
- This is a key part of developing future systems successfully, by learning from the good and bad points of developing the current system
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