This instructional design model was developed by Michael W. Allen as a response to a simplified version of the well-known ADDIE model. SAM, an acronym for Successive Approximation Model, uses an iterative process, meaning that the steps are repeated along the way until a final design is decided upon. Its central premise is boosting efficiency by developing a provisional training prototype before creating the final content. Through successive cycles of creation, review, and improvement, the model works towards a finished product that meets learning objectives.