During the implementation phase of a construction project, the customer asked a key subcontractor to deliver a work package earlier than planned. The subcontractor was unprepared and requested additional budget. What should the project manager do first?

The project manager should first update the risk register and project log because the subcontractor's request for additional budget due to an accelerated delivery demand represents a new risk or an escalated existing risk. Documenting this issue in the project log ensures it's formally recorded for tracking and future reference. Managing the budget closely is a direct consequence of this new financial impact. Revising the project scope is incorrect because the core work package deliverables haven't changed, only the timing and cost. Submitting a change request to accelerate delivery is premature; the immediate issue is the cost implication and its impact, not just formalizing the acceleration. Asking senior management for additional funds is a potential later step, but it's not the first thing to do; the project manager needs to assess the situation, document it, and understand the full impact before escalating.