The Center for Innovative Materials Processing through Direct Digital Deposition (CIMP-3D) possesses extensive modeling, simulation, and analysis capabilities involving all aspects of the additive manufacturing (AM) process. An important aspect of these capabilities is the Center Associates having very unique expertise that collectively represent world-class competence in modeling and simulation. These capabilities are being utilized to develop an integrated, comprehensive, physics-based approach to describe and link important relationships that govern additive manufacturing. Practical ramifications of this effort include the ability to optimize designs based on process, performance, and economic considerations, advance process control techniques for improved reliability, and influence resultant properties and characteristics for producing components and structures used for demanding applications. Shown below is a diagram detailing the modeling approach underway, as well as identification of the various investigators involved in this effort.