Sanjay works in a busy retail pharmacy. During the rush Sanjay fills at least 30 prescriptions. After the rush is over, Sanjay is putting away bottles of drugs. He notices that he has a .2 mg bottle of thyroid medication but does not remember filling a prescription for a .2 mg dose. Sanjay realizes that he sent a customer home with the wrong drug. What quality is MOST important for Sanjay in this situation?