This class reviews the fundamental elements of incident scene size-up, to help inform "the why" behind scene size-up in addition to "the how." It reviews the decision-making process and explains how the effective fire officer can use the cues and clues captured during size-up to rapidly develop an initial incident action plan. It provides a framework and a "how-to" template to assist fire officers in coalescing their size-up and their initial action plan into a concise yet complete and effective on-scene and situation radio report to paint a picture for incoming units and command officers and to more effectively, efficiently, and safely guide the first five minutes of the incident.