Change management is the policy that governs how changes to systems, applications, or infrastructure are made in an organized and controlled manner. The project manager should consult the change management policy to ensure that the proper processes and procedures are followed before deploying the release. This includes verifying approvals, testing, rollback plans, and ensuring that the deployment will not disrupt business operations.

A pilot is a trial or test run of a new solution or architecture using real data in a controlled environment. This allows the company to evaluate the performance and suitability of the new CSP's architecture before fully committing to it. A pilot helps identify potential issues and provides a real-world assessment of how the new solution works with the company's data and requirements.

Compute and storage reporting is the best resource to help estimate cloud costs for a redundancy option for an on-premises server cluster. Compute and storage reporting provides information about the current usage and performance of the on-premises servers, such as CPU, memory, disk, network, and I/O metrics. This information can help to determine the appropriate cloud service level and configuration that can match or exceed the on-premises capabilities.
Compute and storage reporting can also help to identify any underutilized or overprovisioned resources that can be optimized to reduce costs.