Consider a multi-year, cross-functional programme aimed at digital transformation within a large multinational corporation. The programme comprises several distinct projects, each managed by a dedicated project manager within different business units. Initial reports indicate that while individual projects are meeting their specific deliverables and timelines, there is a growing divergence in their outputs, leading to integration challenges and a failure to realize the anticipated synergistic benefits. Feedback suggests that project managers are prioritizing their unit\'s immediate objectives, often at the expense of broader programme goals, and that decisions impacting multiple projects are being made in isolation. Which of the following actions would most effectively address this systemic issue and re-establish strategic coherence for the programme, in accordance with robust programme management principles?