The project manager should have performed an analysis to ensure that the change request was valid and well- supported before submitting it to the sponsor. This would help in making a strong case for the change request and increase the chances of its approval.
The project manager should have performed an analysis to affirm the request is valid before submitting, as this would help to justify the need for the change and to demonstrate its impact on the project objectives, scope, schedule, cost, quality, and risk. The project manager should also have consulted with the project team, the subcontractor, and the risk owner to determine the best risk response strategy and to estimate the resources and time required for the change. By performing an analysis, the project manager could have increased the chances of getting the change request approved by the sponsor and avoided wasting time and effort on an invalid request. References: The Standard for Risk Management in Portfolios, Programs, and Projects, page
79; PMBOK Guide, 6th edition, page 115.