The time during which a study is being conducted which could be one or more parts of a day, all day, or more than a day
In economy study, the length of time that is presumed to be covered in the schedule of events and appraisal of results Often the anticipated life of the project under consideration, but a shorter time may be more appropriate for decision making
the time during which the parking study is conducted, usually between 10: 00 A M and 6: 00 P M Increasing emphasis, however, is being placed on inclusion of the morning and evening periods within the length of the study Certain uses, such a theatres, may peak in the evening hours, while residential parking demand peaks around 3: 00 A M