> 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