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Which of the following system and data conversion strategies provides the GREATEST redundancy?

A.
Direct cutover

B.
Pilot study

C.
Phased approach

D.
Parallel run

Explanation:
Parallel runs are the safest-though the most expensive-approach, because both the old and new
systems are run, thus incurring what might appear to be double costs. Direct cutover is actually
quite risky, since it does not provide for a ‘shake down period’ nor does it provide an easy fallback
option. Both a pilot study and a phased approach are performedincrementally, making rollback
procedures difficult to execute.

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