Rarely in life do we get the chance to get more for less, and the world of simulation is no different, or at least not until now. Typically in our simulations we have to make compromises, and in choosing those compromises we need to know which models will give us the best information at the minimum cost. We must also understand the assumptions our choices carry and how these might influence the decisions we make. This after all is the art of being a good Simulation Engineer. Before we begin and lose ourselves in the wonders of multiphase, imagine if you will a beach, the sun is beating down, the wind is blowing and the surf is up. The sea looks a little rough, but being a good Simulation Engineer the foamy seas pose no worries to you and your recent lunch…..