Starting in the late 1980s, an independent initiative led by John Moubray corrected some early flaws in the process, and adapted it for use in the wider industry. Moubray was also responsible for popularizing the method and for introducing it to much of the industrial community outside of the aviation industry. In the two decades since this approach (called by the author RCM2) was first released, industry has undergone massive change with advances in lean thinking and efficiency methods. At this point in time many methods sprung up that took an approach of reducing the rigour of the RCM approach. The result was the propagation of methods that called themselves RCM, yet had little in common with the original concepts. In some cases these were misleading and inefficient, while in other cases they were even dangerous. Since each initiative is sponsored by one or more consulting firms eager to help clients use it, there is still considerable disagreement about their relative dangers (or merits). Also there is a tendency for consulting firms to promote a software package as an alternative methodology in place of the knowledge required to perform analyses.