akirk wrote: Sadly - you can't remove all mistakes, humans are fallible!
Indeed. Sadly, people are often too optimistic and choose (whether consciously or not) to ignore some potential outcomes. That, with minimal or zero safety margins, can lead to tragedy.
There's a move in 'safety' circles, to consider where people can make mistakes and remove the 'option'. Simply, if you don't have the option to make a mistake, then you won't. Not easy to apply to what we're talking of here!
https://www.eurocontrol.int/sites/defau ... 13-web.pdf
http://jalopnik.com/5865117/how-the-wor ... h-happened