Which THREE of the following are true with regard to managing the changeover from an...

Pilot changeover moves the simplest part of the business to the new system first

Parallel running involves keeping the old system running normally until certain data retention criteria are met or confidence is gained, while the new system deals with the new workload Data input is usually earned out on both systems

All methods of changeover carry high risk and it is the preparation consideration of data compatibility and data cleansing before the changeover which has the biggest impact on the smoothness of the transition

Phased changeover moves individual portions of the business to the new system one at a time

Direct changeover, or big bang, is only used when the systems are significantly different such that comparing the outputs of the two systems is largely irrelevant

Phased changeover is the safest and slowest method of changeover