PSY 330 Human Factors
5/1/00
Day 2-9
Reliability
uDEFINITION:  Probability of a successful outcome of the system or component.
lReliability is also defined in terms of system requirements.
uThus, to evaluate a system it is necessary to know the goals and purposes of the system.
lReliability is a probabilistic term.
uNever seen the perfect system.
uCalculation of Reliability
lR = (# of successful operations)/(total # of operations)
lR = 1 - EP