Instead, all workers were treated as interchangeable, and each room was given to a team of 15 to 25 workers who were made jointly responsible for performing, in a specified time, a broadly defined task, such as electric wiring, door assembly, fitting upholstery, or installing an exhaust system. In each room, there might be 60 different things to do to finish the assigned task, and workers were free to decide how to do it and who did what and when.