Ghostdancer said it all in one sentence:
Ultimately SMS is all about getting the right culture into an organisation.
Exactly the same could be said for ISO 9000
et seq. In fact, if you look at it with an open mind, both approaches share a great many practical similarities as plain old "good business sense", certainly enough to be considered siblings.
Unfortunately, the implementation of SMS is likely to suffer the same birth defects as was the case for the ISO 9000 family - it was hijacked by commercial interests that turned it into the greatest paper consuming exercise of all time, so focused on minutiae that the strategic gains were obscured or lost. Both of these babies were conceived in simplicity as good management practices and are best born at home with loving parents, not forcibly extracted by huge surgical teams of self-professed experts trying to outdo the annual cost of Medicare/National Health!
Please, let's not miss the point...
Stay Alive,