“Cloud Lift” (migrating on-premises systems to the cloud) is often sold as a simple infrastructure change. In reality, for large-scale administrative systems, it is a high-risk operation. When you move a system handling millions of transactions — such as unemployment insurance or tax processing — you cannot afford a single calculation error or performance regression.
The challenge lies in validating that the new system behaves exactly like the old one across thousands of business scenarios. Manual testing is too slow, and unit tests often miss the holistic impact of infrastructure changes.