If the user’s goal is to select the strongest model available, then start with the ‘beefiest’ or biggest model. If the user’s goal is to select the lowest cost model, then start with the narrowest or smallest model and move up beefier models if required until a point is reached where the calculation shows a SUCCESS. Users may prefer a stronger model for several reasons: to achieve higher safety factor, to allow for addition of more antennas in future, to allow for the possibility of expanding tower height by one or more sections.