Interpreting Indicators for Rangeland Health has been developed for use by experienced, knowledgeable land managers or technical assistance specialists. This assessment protocol is not intended for use by individuals who do not have experience or knowledge of the rangeland ecological sites they are evaluating. This protocol requires a good understanding of ecological processes, vegetation, and soils for each site to which it is applied. Our research has shown that the quality and consistency of evaluations is improved when two or more individuals (e.g., ecologist and soil scientist) work together. The input of multiple individuals is particularly critical in the development of reference sheets for each ecological site. Development of the reference sheets requires a knowledge of the range of spatial and temporal variability apparent at a particular ecological site.