Most companies seeking value from Digital Twins would like to virtually prototype their products as completely as they can – as systems-of-systems. To be able to construct such holistic product-level Digital Twins, it is vital for them to be able to simulate their multi-disciplinary systems in an integrated manner. This panel will explore ways by which Altair and its technology partners are continually expanding the boundaries to enable our mutual customers to benefit from Digital Twins of ever-increasing complexity and fidelity. Emphasis will be placed on sharing actual customer examples. Two technology shifts, in particular, will be in the spotlight here: one that is a more horizontal expansion (focused generally on Model-Based Systems Engineering or MBSE) plus one that is a more vertical expansion (focused specifically on the inclusion of flexible tires in simulations of off-highway vehicles moving in soft soil).