What about the mythical 70% failure rate for change in organisations? This has been searched for quite dilligently in the literature by Mark Hughes; who concluded that although well reported by very respected reporters, there was very little substantial measurement data to support the reports. Hence it becomes an urban myth. The dilemma is: what is the cause of the myth? Is it a myth about performance in doing change (the reality is that the success rate is much higher); or is the cause in the way success (and hence failure) is defined?