ABSTRACT
Another related technique which attempts to involve the notion of participation in the making of decisions is the Delphi technique, which is used to set threshold values or critical levels or standards of specific aspects of a development (such as pollution levels or maximum visitor numbers) or to identify positive and/or negative impacts of a development. It is a judgemental technique involving the subjective assessments of those who take part, although it is often seen ‘as a means of collecting expert or informed opinion and of working towards consensus between experts on a given issue’ (Green and Hunter, 1992: 37).
