Is increasing a ship's crew primarily a schedule problem or an up-front financial problem?
Short answerTraining creates the immediate time constraint, but fleet scale determines the personnel burden and can also make specialized training easier to justify.
NotesFour or five extra people on two ships is a small numerical change but still requires the right training pipeline. Ten extra billets across twenty-two ships becomes a requirement for 220 sailors, making the force-wide cost much more visible. At the same time, a larger population can justify dedicated training more easily, and existing technical schools may absorb common specialties such as weapons technicians.