Parking meters, appointments, bus schedules and lunch hours; hunger, mental fatigue, and physical exhaustion--the duration of a museum visit is related to a variety of factors that we all realize, but often seem to forget. The time a visitor spends is more than seconds, minutes, and hours; it is a measure of constraints, needs, and values. THe allocation of this valuable commodity is a useful barometer to the visitor's underlying interests, motivations, satisfactions, and dislikes. Time is perhaps not coincidentally, the single most frequently used for evaluating exhibit(s) quality