It would be naïve to suppose that any one variable could ensure the success of planned change. The factors contributing to failure and success are numerous, and the possible interrelations between them immensely complex. The acceptability of the innovator is therefore no more than a small part of the success of a development project. But, if the analysis of one specific example of this single factor allows a better understanding of one necessary condition of change, it will also increase the possibility of control over one potential area of failure.