In the SEI's examination of the software sustainment phase of the Department of Defense (DoD) acquisition lifecycle, we have noted that the best descriptor for sustainment efforts for software is "continuous engineering." Typically, during this phase, the hardware elements are repaired or have some structural modifications to carry new weapons or sensors. Software, on the other hand, continues to evolve in response to new security threats, new safety approaches, or new functionality provided within the system of systems. In this podcast, Mike Phillips and Harry Levinson will examine the intersection of three themes—product line practices, software sustainment, and public-private partnerships—that emerged during our work with one government program. Listen on Apple Podcasts.