Who shoud have more of say during negotiation of resources the project manager or the line manager?

In resource negotiations, the project manager should have more say as they are directly responsible for the project's success and understand its specific needs and timelines. However, the line manager also plays a crucial role in resource allocation, ensuring that team members' workloads and departmental priorities are balanced. Ideally, both should collaborate to find a solution that meets project demands while maintaining overall organizational efficiency. Effective communication between the two roles is key to successful resource negotiation.