Objective numbers are presented as a point estimate, but usually with a range around the point. This range may be expressed as a fixed range or as a percentage variation from the point objective (usually 20%). The major reason for this range is that counting elk is an inexact science and counting conditions vary from year-to-year and a range is necessary to take this variation into account and determine whether a real change has occurred. Therefore, we also generally use a 2-year period to make changes if counts are below objectives because of the possibility of poor survey conditions. However, because seldom, if ever, do we count more elk than actually exist, we will recommend regulation changes immediately when the number of elk counted are above the objective range.