The role of a Project Manager is the combination of all the options, but the one that is most critical to the project's success is that of an Integrator. As described in the question, a Project Manager is expected to integrate the project management processes and coordinate the process phases through the project management cycle to ensure that all areas of the project come together to successfully deliver the project. Integration involves pulling together all aspects of project management including scope, cost, schedule, quality, and communication in addition to working with other departments such as Legal, Human Resources, Training, Contract Administration, and Information Technology.