Final answer:
The 3 important output items of initiating a project are the project charter, stakeholder register, and communication plan.
Step-by-step explanation:
The 3 important output items of initiating a project are the project charter, stakeholder register, and communication plan.
A communication plan is a document that outlines how communication will be managed throughout the project. It identifies the key stakeholders, their communication needs, and the methods and frequency of communication.
For example, the communication plan may specify that weekly status meetings will be held with the project team and monthly progress updates will be provided to senior management.