NASA-JPL engineers adopt Altair® EEvision™ electronic system visualization software to help develop their Europa, Psyche, and Mars Sample Return interplanetary space missions. JPL develops complex electrical systems and wire harness designs for its space missions and programs. Capturing requirements and implementing designs for these complex electrical systems is a highly iterative and cyclical process. JPL selected EEvision to help implement a model-based, requirements-driven process to improve the development processes for these missions and future projects.