Are the numerical definitons of tolerable and broadly acceptable in relation to Nimrod safety known (i.e. is this information releasable)?
I assume "broadly acceptable" (at system/aircraft level) is up around the 10-7 / 10-8 failures (with critical safety consequences - i.e. loss of life/serious injury) per (flight) hour, but where is "tolerable" risk zone - 10-5, 10-6? I assume these numerical definitions have been set by the Nimrod project, based on extant HSE guidance & other project comparators?
Can anyone point to some example HSE type rates for different types of system/project (e.g. airliners/oil production platforms etc.)?
EDIT to add - safeware, you appear to have partially answered one of my questions a few minutes before I asked it - I didn't see your post before I posted!