The best approach for a project manager to help a new compliance specialist improve is to engage directly with the specialist to understand their perspective and provide targeted feedback. This aligns with the PMBOKGuide's emphasis on effective communication and stakeholder engagement as key aspects of project management. By coordinating a one-to-one meeting, the project manager can offer constructive feedback, understand any challenges the specialist is facing, and work together to develop a plan for improvement. This method is also supported by the Professional in Business Analysis (PBA) reference materials, which advocate for direct communication and feedback as tools for professional development.
References: PMBOKGuide - Sixth Edition; Professional in Business Analysis (PBA) Reference Materials.