To address this, Hess developed an integrated work flow that leverages knowledge from multiple disciplines to create a series of conceptual simulation models that cover the range of expected performance. A central part of the work flow is the use of Enable to build, run, and analyze Eclipse simulation models to yield unbiased performance estimates that incorporate the ranges assigned to all static and dynamic reservoir parameters, and to ensure that all performance estimates have a physical basis. A typical Fast-Track assessment is performed in a few days. If data ranges are changed for any reason, the entire suite of models and results can be regenerated in hours. Models can be as heterogeneous as desired and any type of well configuration or recovery process can be tested.