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
