A man–machine chart graphically represents the relationship between the manual work performed by one or more operators and one or more machines involved in a manufacturing process. It is a diagram which describes the activity of a man and machines he is attending against a time scale. The graphical representation captures different tasks required in a production process like to load, operate and unload machines in conjunction with the auto cycle times of the machines themselves. This process usually involves performing as much manual work as possible internal to the machine cycles. This chart shows very clearly periods of idleness on the part of any of the subjects during the process. A study of the chart often makes it possible to rearrange these activities so that such ineffective time is reduced.