Explanation
The project manager should identify the root cause of communication issues because this is the first step to address the problem and improve the project team effectiveness. Communication is a vital aspect of project management, especially for global virtual teams, who face various challenges such as time zones, languages, cultures, and technologies. The project manager should analyze the communication needs, preferences, and barriers of the team members and stakeholders, and determine the root cause of the communication issues that are affecting the project performance and quality. The root cause may be related to the communication methods, channels, frequency, content, feedback, or expectations. By identifying the root cause, the project manager can then implement appropriate solutions, such as enhancing the communication plan, using effective tools and techniques, providing training and coaching, establishing trust and rapport, and monitoring and controlling the communication process. References:
A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Seventh Edition, Chapter
3.2.2, page 51
Agile Practice Guide, Chapter 2.1.2, page 15
PMP Exam Content Outline, Domain II: Planning, Task 3