The actual POD can be compared to that estimated by the team which actually searched the area. When this exercise is practised several times, searchers will become more familiar with what it is that actually affects POD in the field. It is a good idea to use two areas for the exercise. One, used as a control, should contain clues but should not be used for POD calculations. In addition, clues should not be placed so close together or in such a quantity as to clutter the area in an unrealistic manner.
Realism is important and a great number of clues is unnecessary.