HI Helen. in terms of time do you mean length of treatment time or number of sessions.

I would think a good way forward is the development of a step down process. i.e. Triage and assessment. then individual treatment for 4-6 sessions maximum, then a group class for 6-8 weeks, followed by a followup check at 3 months. The patients should not be able to reapply to the triage level with the same condition during the 3-4 month period (stopping repeated waiting list offenders/squatters)