The long, exacting, and frequently hazardous nature of starship duty places a very considerable toll on its crew. Yet the nature of Starfleet missions requires each crewmember to be continually operating at very near 100%. The success of a mission, the safety of the ship, or the fate of an entire planet can at any moment hinge on the performance of any crewmember. Reconciling the demanding nature of starship duty with the need to maintain quality over extended periods is a difficult goal, but StarfleetÕs personnel policies make it a reality.