Explanation
According to the PMBOK Guide 7th Edition, the communications management plan is a document that describes how the project information will be planned, managed, monitored, and controlled. It includes information such as the communication requirements, methods, channels, frequency, roles, responsibilities, and escalation procedures for each stakeholder group. The communications management plan should be used to help avoid this kind of situation, as it would specify how the team member should communicate with the supplier, what mode and frequency of communication should be used, what information should be exchanged, and what actions should be taken if the communication fails or the response is delayed. The communications management plan would also define the escalation process for reporting andresolving issues that affect the project performance or stakeholder satisfaction. A statement of work, an escalation process, or a stakeholder register are not sufficient documents to help avoid this kind of situation, as they do not provide the comprehensive and detailed guidance on how to communicate effectively and efficiently with the supplier and other stakeholders involved in the server acquisition. References: PMBOK Guide 7th Edition, page 105-106.