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Implementation (direct changeover (advantage : (Fastest method of…
Implementation
direct changeover
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Disadvantage
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All staff need to be fully trained before the change, which may be hard to time/plan
If the new system fails, you might lose all the data
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Phased implementation
advantage
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If the new system fails, you only need to go back to the latest phase do not have to review the whole system
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disadvantage
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If there is a problem, then some data may be lost
pilot running
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disadvantage
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If the system fails in one of the branches, data can be lost