chapter  4
Takt time and capacity
Pages 18

Often confused with process time or with customer demand, the takt time of a line actually is the time that must elapse between two successive unit completions in order to meet the demand if the line makes the product one unit at a time at a constant rate during the net available work time. It is a function of both the demand and the available work time. Assembly lines are designed for a minimum takt time and operated at an actual takt time that is usually longer, and adjusted only in response to major shifts in demand.