A project manager held a meeting and finalized the project schedule. A critical stakeholder who was not consulted later objects because they have a preexisting commitment that conflicts with the published dates. What should the project manager do first?

The project manager should first organize a new schedule-framing meeting with the critical stakeholder to obtain their input. This is the most direct and collaborative approach to address the stakeholder's concerns and integrate their availability into a revised schedule. By involving the stakeholder, the project manager can foster buy-in and prevent future conflicts. Discussing the issue with the project sponsor and producing a revised schedule without the stakeholder's input risks creating another schedule that doesn't meet their needs. Analyzing the root cause and updating the communications management plan is a good long-term step, but it doesn't immediately resolve the current schedule conflict. Contacting the project sponsor for additional resources is premature; the immediate problem is a scheduling conflict, not necessarily a resource shortage.