With the expectations that the LYEE (governmentaL methodologY for softwarE providencE [1]) methodology may enable to develop software systems without any detailed coding knowledge and to shorten the development time as well, it was considered that the methodology may suit for fostering system architects by going through several repetitions of actual systems development in a much shorter time than having trainees gone through conventional on-the-job-training approaches. Receiving a LyeeAll2 training first time, the LYEE methodology was successfully implanted in the authors' company. Capabilities of using LyeeAll3, the next generation tool, were then readily obtained. Through the development of a couple of actual systems, the initial expectations were confirmed and the methodology seems to be useful for developing system architects from engineers with non-software background.