Exam 712-50 topic 1 question 349 discussion

Smith, the project manager for a larger multi-location firm, is leading a software project team that has 18 members, 5 of which are assigned to testing. Due to recent recommendations by an organizational quality audit team, the project manager is convinced to add a quality professional to lead to test team at additional cost to the project.
The project manager is aware of the importance of communication for the success of the project and takes the step of introducing additional communication channels, making it more complex, in order to assure quality levels of the project. What will be the first project management document that Smith should change in order to accommodate additional communication channels?