Has anyone seen the risk assessment process that the european agencies used to ascertain whether it was safe to fly or not?
Indeed was there/is there a safety management system in place that covers aviation threats from natural disasters? What process was undertaken before the unilateral decision was made to close airspace entirely rather than re route around designated portions of airspace?
It would seem that rather than an ordered, clinical process being followed a lot of the reaction was a knee jerk and countries closed airspace on the basis of what someone else did. I know volcanic ash is dangerous, but SE Asia has many sputtering volcanoes that do not close entire tracts of airspace for days at a time.