Question

An organization is replacing its legacy order-management system with a new platform. Due to limited resources and a desire to reduce operational risk, management decides to migrate one regional business unit at a time over several months, keeping the legacy system running for units not yet cut over. During the audit of this implementation, which control is MOST important for the IS auditor to verify is in place?

Accepted Answer

Interface and data-synchronization controls that maintain consistency between the legacy and new systems for units operating on different platforms during the transition period

Answer

A signed acceptance from the vendor confirming that the full source code has been placed in escrow before the first unit is migrated

Answer

A complete parallel run in which all regional units process every transaction on both systems simultaneously until final cutover

Answer

Confirmation that the legacy system is decommissioned immediately after the first regional unit is successfully migrated