Question

Please answer the question below and clearly explain..........There are four methods of system conversion: parallel, direct cutover, pilot, and phase‐in. Describe these four methods and how they differ.

Answer 1

Parallel conversion : A parallel conversion is one in which both the old and new computer systems are operated simultaneously. This is usually done to keep the old system available as a backup until the new system is working satisfactorily.

Direct cutover : causes the changeover from the old system to the new system to occur immediately when the new system becomes operational. It is the least expensive changeover method because the IT group has to operate and maintain only one system at a time.

Pilot conversion : A pilot conversion is a hardware or software migration method that involves rolling out the new system to a small group of users for testing and evaluation.

Phase-in conversion : The phase-in conversion is a method in which the system is broken into modules, or parts, which are phased in incrementally and over a longer period.

Difference between 4 conversions:

Parallel	Direct Cutover	Pilot	Phase-in
It is very costly as two systems are being operated simultaneously, so there will be the costs for more power	It is less costly as it is a direct change overToo much time is involved testing in one location, there is also increased development and labour costs	Too much time is involved testing in one location, there is also increased development and labour costs	It takes a lot of time to implement the whole new system to the entire organisation.