(i) Parallel changeover strategy allows cross checking while direct changeover strategy does give room for crosscheck.
(ii) parallel changeover strategy allows room for training and smooth switch to the new system while direct changeover strategy does not.
(iii) Parallel changeover strategy is expensive than direct changeover strategy.
(iv) Parallel changeover is less risky as compared to direct changeover strategy.
maurice.mutuku answered the question on May 3, 2018 at 15:21
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