Although the technology is promising, it needs additional development to make it generally usable. This is not surprising given its mathematical foundation. On the other hand, we believe our demonstration is a turning point in the use of mathematically rigorous approaches in industrial software development and maintenance. We have demonstrated here the capture via mathematical methods not only of software engineering design rationale, but also of the product design and manufacturing process rationale used by different engineering disciplines, and the production of usable software directly from the captured rationale. We feel that that further evolution of the tools for this technology will make formal systems engineering a reality.