> Fred Brooks and the mythical man month observed that communication between people expands faster than linear, and that adding more people to a project makes it later.

In my experience with more than a couple dozen software projects, the ideal team size to successfully deliver a non-trivial effort is between five to nine people.

  One subject matter expert visionary
  One technical architect visionary
  One or two technical masters
  One or two UI/UX masters
  One or two padawans capable of becoming a master

Staffing exceeding the above for an individual team is more a managerial genitalia contest than anything focused on organizational success.