TOP uses the same hierarchical model to help develop programs, track their progress in reaching intended outcomes, and evaluate their contributions to intended outcomes. The hierarchical model, on which TOP is based, first published in 1975, is frequently used in evaluating extension programs in several countries. Use of the hierarchy also has spread to numerous other types of non-formal educational programming. Now TOP is available on-line. The web site is a review draft.
Plans are for a formal peer review to merit sponsored publication.