A time study is a structured process of directly observing and measuring human work using a timing device to establish the time required for completion of the work by a qualified worker when working at a defined level of performance. Typically, time studies determine the time required for a worker to complete each task. by breaking the work into small, easily-measurable components or elements, measurement of those components and, synthesizing data from those measured components to arrive at an overall time for the complete job. Time studies are often used to analyze cyclical jobs, or jobs that are conducted repeatedly by the operator. Many times, these types of tasks are considered "event based" studies because time measurements are triggered by the occurrence of predetermined events.