In situations where a team member is unable to participate in all scheduled project activities due to conflicting operational schedules, it is advisable for the project manager to discuss the matter with the team member's functional manager. This approach allows for exploring possibilities to adjust the conflicting schedules and find a mutually agreeable solution that enables the team member to fulfill their project responsibilities. This strategy is consistent with the PMBOKGuide's principles of stakeholder engagement and resource management, which suggest negotiating and collaborating with key stakeholders to optimize resource allocation and ensure project success.
References: The answer is supported by the PMBOKGuide, which outlines the importance of stakeholder engagement and effective communication in managing project resources1. Additionally, the PMI Guide to Business Analysis emphasizes the need for collaboration and negotiation to resolve scheduling conflicts and ensure that project activities are adequately staffed2.