Advances in computers and software tools have fueled the demand for increasingly sophisticated mathematical models and simulators. This Spotlight provides guidance for maximizing the benefits of modeling within a project as the project evolves through its lifecycle. It emphasizes pragmatic advice and guidance based on practical project experience rather than process engineering or modeling theory. The book is written for a wide audience, ranging from engineers who need to understand how their modeling work fits into the bigger project picture, to systems engineers and project managers who need to understand how modeling can be used effectively. In terms of project applicability, the text covers a broad spectrum of projects; however, no mathematical or engineering design expertise is required by the reader.