It is actually simple. Just look into any business where safety and security matters. I'm in automotive [0]. There is somebody who has to sign that the softwar

It is actually simple. Just look into any business where safety and security matters. I'm in automotive [0]. There is somebody who has to sign that the software is safe. Without someone to make that signature the car does not get released. For Free Software, look at Sqlite. There are some nice slides from 2009 [1]. In general it results in some simple rules like "100% test coverage". Of course, these rules (while simple) are not easy to satisfy and certainly expensive. [0] http://beza1e1.tuxen.de/aspice.html http://beza1e1.tuxen.de/aspice.html [1] https://www.sqlite.org/talks/wroclaw-20090310.pdf https://www.sqlite.org/talks/wroclaw-20090310.pdf