During UAT the sponsor requests a couple of additional features that would require the team to work overtime to meet the firm go-live date. What should the project manager do?

The correct answer is to consult the project team and present options to the sponsor. As a project manager, your role is to facilitate solutions and manage expectations. Engaging the team first allows you to understand the actual impact of the requested changes on scope, schedule, and resources. Based on this, you can then present the sponsor with realistic options, such as accepting the new features with a revised go-live date, prioritizing features, or exploring additional resources. Submitting an emergency change request and assigning tasks without team consultation is premature and bypasses proper planning and impact assessment. Requesting overtime approval and bonuses without first assessing the feasibility and impact with the team is also premature and may not be the most effective solution. Telling the sponsor the team cannot take on more work is confrontational and unconstructive; a project manager should always seek solutions and present choices.