It is very interesting to see all these numbers, describing the statistical probability of single and dual engine failures. But I can assure you all, that when you are sitting 180 min from an airfield and one engine suddently becomes very silent, numbers don't mean **** . You are sitting there with one engine left, build by the same manufacturer, at the same plant and maintained by the same people as the one that just stopped working.
Perhaps engines on etops a/c should comply with the same requirements as flight control computers, build at different locations and maintained or at least overhauled by different organizations.
But I guess as always the only numbers that really matters are those followed by a $