I remember reading elsewhere that bad stuff happens largely because of incomplete or conflicting requirements, and that implementation bugs are secondary. My ow

I remember reading elsewhere that bad stuff happens largely because of incomplete or conflicting requirements, and that implementation bugs are secondary. My own experience confirms this, even though I usually deal with systems where a problem at worst results in lost sales / orders and thus sloppy coding and implementation bugs are much more common. Makes me wonder how well-polished the requirements analysis for (nuclear) power plant software is...