Per Wikipedia: "ModelCenter, developed by Phoenix Integration, Inc., is a software package that aids in the design and optimization of systems. It enables users to conduct trade studies, as well as optimize designs. It interfaces with other popular modeling tools, including Systems Tool Kit, IBM Rhapsody, No Magic, Matlab, Nastran, and Microsoft Excel. ModelCenter also has tools to enable collaboration among design team members.

A major benefit of ModelCenter is that it allows integration of models from standalone applications. Data from dissimilar components can be integrated into a system model within ModelCenter. ModelCenter allows for the automation of data transfer among applications. For example, outputs from an STK simulation can automatically be transferred into a cost model."