Which phase follows Testing and Commissioning in the systems verification process?

In the systems verification process, the phase that follows Testing and Commissioning is Final Acceptance. This phase is significant because it involves the client or end-user officially accepting the system after it has been successfully tested and verified against the established requirements.

Final Acceptance typically signifies that all functionalities perform as intended and that the system meets the necessary standards and specifications. It marks the completion of the project, transitioning from the implementation phase to ongoing operations and maintenance. This is crucial for the project team to receive formal closure, ensuring that all contractual obligations have been met and that the client is satisfied with the delivered system.

The other options do not accurately represent the immediate subsequent step after Testing and Commissioning. Initial Testing is an earlier phase focused on preliminary assessments, Documentation Phase pertains to compiling and finalizing project documents, and System Design Review occurs well before Testing and Commissioning, focusing on validating the design before actual deployment.