You use this measurement technique when countable events occur during the life of a work package. Typical examples of such events include production, creation or delivery of a particular number of drawings, films, or data carriers.

Quantities in the Project System are managed by means of statistical key figures. You maintain statistical key figures by going to the Project Management Basic Data menu and choosing Standard structures ® Statistical key figures. Then choose List display to view a list of all the statistical key figures which have been maintained.

You have defined a suitable measurement method in customizing. In the measurement method, you maintain the statistical key figure to which quantity proportionality is to refer. You can only maintain one key figure per method.

To create statistical key figures, go to the Project Management Basic Data menu and choose Standard structures ® Statistical key figures. For this method, use only statistical key figures of the category Total values.

To maintain plan values for statistical key figures, go to the Project Planning menu and choose Costs/Revenues ® Statistical key figures. You enter actual values from the Project Execution menu, by choosing Completion Confirmation ® Statistical key figures.

The system determines the percentage of completion (POC) as the ratio of the quantity unit to the overall planned quantity.

Planned POC = Planned quantity / overall quantity * 100

Actual POC = Actual quantity / overall quantity * 100

You want to create 60 drawings for an activity. You distributed the planned quantities evenly over the periods. You take the cumulative POC for the individual periods from the table.