In 2008 the RAF Air Staff conducted a Capability Health Check which identified, amongst other things, the impact at point of delivery (hangar floor, cockpit, office) of accumulated risk from unconnected and unrelated change programmes - many of which were outwith the control of the RAF. Morover, becasue fo skills dilution in many areas, risk was being taken on areas where risk had already been taken (ie cutting corner on corners that had, err, already been cut, if you get my drift).
The findings of the study correlate very very closely with the RNZAF observations; the tragedy is that it has taken 3 fatalities to highlight impact of accumulated risk.