The object of production has been described as “to produce a required quality by the best and cheapest method at the required time.” In order to accomplish this aim, the use of scientific methods has become so common and extensive a practice in industry that it is now considered the basis of modern industrial development. Many developments have been made in the several fields to which this principle has been applied, among which is motion and time study. At first, time study, originated by Frederick W. Taylor, the father of scientific management, and motion study, developed by Frank B. and Lillian M. Gilbreth, each more or less made separate and independent progress- time study being used mainly for determining time standards, while motion study was used for improving methods. However, it has gradually been realized that motion study and time study not only supplement each other, but are actually inseparable; and it is becoming common practice to combine the two together as Motion and Time study, or as it is sometimes called, Methods Engineering.