There are four main systems of work measurement. First, and most used, is time study, specifically, stop-watch time study. Motion picture and video cameras, computers, and various production timing devices can also be used in the place of, and in conjunction with, the stop watch. The second system, work sampling, is a statistical procedure for measuring work and requires an understanding of the techniques of statistics and probability.
The third system, predetermined time systems (PDT), uses sets of tables of basic motions that have already been "normalized" by experts. Thus, PDT systems do not require the analyst to "rate" or "level" the measurement. Finally, there is the standard data system of work measurement which, strictly speaking, is not a measurement technique at all. Here similar elements made up of similar groups of motions from the other measurement systems are tabled and then reused as needed for subsequent products and standards.
USES OF WORK MEASUREMENT
Work measurement is used to determine standards against which comparisons can be made for a variety of purposes.
1. Wage incentives. If workers are to be paid in accordance with the amount of work accomplished rather than the amount of time expended (hourly), some means of determining an acceptable,...