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The complexity of modern aerospace vehicles is growing constantly. New technologies create opportunities for higher levels of integration. Modern vehicles contain a larger number of components that interact with each other in non-linear and often unpredictable ways. Unintended interactions lead to unexpected behaviors and consequences, some of which have proven to be catastrophic. A key technical challenge in developing such complex systems is to ensure that catastrophic subsystem and component interactions are well understood and contained prior to full-scale development. To address these challenges, the U.S. Defense Advanced Research Projects Agency (DARPA) is investing in novel methods for design and verification of complex systems. The META program is specifically aimed at compressing the timeline for product development and deployment of complex defense systems, through model-based design and manufacturing.