In this method, the earned value results from the ratio of a unit of measure to the planned total quantity. The unit of measure is valued at the corresponding planned costs. This procedure assumes that there is a time plan that refers to parameters or quantities and that measurable or countable results occur within the time frame of the work package (e.g. produced parts with the same value). The completed value is determined from the quantities already produced. If, for example, a work package consists of 50 quantity units with the unit value 10, the total value of the parts is 500. These quantity units are to be produced in three periods of 10, 15 and 25 parts each. Thus, after the first period, 10 parts have been produced, and the completion value is 100 (10 units of measure multiplied by the unit value 10). To these 10 parts, 15 more units of measure are added after the second period, so that the completion value increases to 250. The total value 500 is reached with the completion of the last 25 quantity units, the work package is completed. (Source: GPM, Mehrmann/Wirtz)