Design Development Plan (DDP) contains:
*final scope statement
*scope management plan
*quality management plan
*communications management plan
*team member list/responsibilities

Communication management plan is the most important part of the DDP because communication management plan contains information on how to contact people and the rules to contact people involved in the project.
But I also feel that Quality of the project is equally important because it shows if the quality of the project management is going well or not ?? It allows us to keep track of how well the project is going and if it is going in the right track or not ? Whether or not it needs to be modified ?
Which phase do you think is the most important ? Please feel free to agree or disagree.