This, then, is the demythologizing of the man-month. The number of months
of a project depends on its sequential constraints. The maximum number of
men depends on the number of independent sub-tasks... From these two
quantities one can derive schedules using fewer men and more months. One
cannot, however, get workable schedules using more men and fewer months.
More software projects have gone awry for lack of calendar time than for
all other causes combined.
-- Frederick P. Brooks, Jr., 'The Mythical Man-Month'
