ICT Systems Analysis and Design CIE: implementing a new system
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Created by:
ajduckworth on February 14, 2012
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Description:
Methods of Implementation - Advantages and Disadvantages
Taken from http://igcseict.info/theory/8/implem/index.html
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9 terms
Terms | Definitions |
|---|---|
 Direct Changeover- Advantages | Takes the minimal time and effort The new system is up and running immediately |
| Parallel Running-- Advantages | If anything goes wrong with the new system, the old system will act as a back-up. The outputs from the old and new systems can be compared to check that the new system is running correctly |
| Pilot Running- Advantages | All features of the new system can be fully trialled If something goes wrong with the new system, only a small part of the organisation is affected The staff who were part of the pilot scheme can help train other staff. |
| Direct Changeover-Advantages | Takes the minimal time and effort The new system is up and running immediately |
| Direct Changeover- Disadvantages | If the new system fails, there is no back-up system, so data can be lost |
| Parallel Running- Disadvantages | Entering data into two systems, and running two systems together, takes a lot of extra time and effort |
| Pilot Running-- Disadvantages | For the office / department doing the pilot, there is no back-up system if things go wrong |
| Phased Implementation - Advantages | Allows users to gradually get used to the new system. Staff training can be done in stages |
| Phased Implementation - Disadvantages | If a part of the new system fails, there is no back-up system, so data can be lost |
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