Delphi method and nominal group technique in family planning and reproductive health research

Both the Delphi method and nominal group technique offer structured, transparent and replicable ways of synthesising individual judgements and have been used extensively for priority setting and guideline development in health-related research including reproductive health. Within evidence-based practice they provide a means of collating expert opinion where little evidence exists.They are distinct from many other methods because they incorporate both qualitative and quantitative approaches. Both methods are inherently flexible; this article also discusses other strengths and weaknesses of these methods.