During the Planning phase, the project manager constructs the communication plan for the project. In a survey in which I participated, more than 90% of the PMs suggested that communication during the Execution phase was the number one priority action for the successful project manager. However, even knowing that communication is a major priority, most of the time, project managers don't write out a formal communication plan. Part of the reason is that it isn't very clear exactly what should be in the plan. Here are some of the communication components that are important for the success of the project.
Channels
There are two aspects concerning communication channels that you need to know for the exam. First, there is a formula that you should remember for the test. It determines how many channels are involved with any number of people. The formula is:
N(N1)/2, where N=the number of people