“…An alternative approach to clinical algorithms of care is to have treatment arranged in a series of steps of graded intensity. A sequential model was recommended in the Royal College of Psychiatrists' Report in 1992 and several alternative models have been described, all of which suggest that a series of treatments increasing in intensity are offered in a stepped fashion (Agras, 1993;Fairburn and Peveler, 1990;Fairburn et al, 1992;Garner et al, 1986;Garner and Needleman, 1997;Tiller et al, 1993). The advantage of such an approach is that it does not waste resources in that those who respond to a minimal intervention are`®ltered out' at the earliest possible stage.…”