What is a disadvantage of matrix project management?

The correct answer highlights that a significant disadvantage of matrix project management is the necessity for cooperation between departments. In a matrix structure, employees often report to multiple managers or work on various projects simultaneously, which can lead to conflicts regarding priorities and resource allocation. This reliance on collaboration can generate challenges, as teams and individuals from different departments may have differing agendas, leading to potential delays and a lack of clarity. Achieving effective cooperation requires strong communication and trust, which can be difficult to establish in a complex organizational environment.

In contrast, the other options describe aspects of matrix management that can be seen as disadvantages or challenges under certain circumstances. For example, duplicating administrative personnel may lead to inefficiencies, but clear decision-making power is generally considered a beneficial aspect of many organizational structures. Resource balancing, while potentially easier due to shared resources across projects, still hinges on the quality of inter-departmental cooperation. Therefore, the emphasis on the need for cooperation among departments is a key factor that directly impacts how well a matrix project management structure can function.