The following from Ben Sandilands is instructive:
At present, there have only been a small number of quality empirical evaluations of SMSs and it is unclear as to whether any individual elements of a SMS have a stronger influence on safety over other elements, although management commitment and appropriate safety communications do affect attitudes to safety.
My bolding
Surely, the reliance on these systems, by atsb's own admission does not have full justification - How can a move to this as a basis for safety, give us a long term safety outcome.
Well??? Mr. atsb