手法を比較

	オンライン・デルファイ法（e-Delphi）	オンライン調査
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	Original Delphi: 1950s–1960s; Online variant: mid-1990s onwards	Mid-1990s (widespread scholarly adoption ~1995–2000)
提唱者	Olaf Helmer, Norman Dalkey, Nicholas Rescher (RAND Corporation); online adaptation emerged in the 1990s–2000s	Mick P. Couper, Don A. Dillman (early systematic frameworks)
種類	Iterative expert consensus method (online)	Quantitative / mixed-methods data collection technique
原典	Hasson, F., Keeney, S., & McKenna, H. (2000). Research guidelines for the Delphi survey technique. Journal of Advanced Nursing, 32(4), 1008–1015.	Couper, M. P. (2000). Web surveys: A review of issues and approaches. Public Opinion Quarterly, 64(4), 464–494.
別名	e-Delphi, electronic Delphi, web-based Delphi, internet Delphi	web survey, internet survey, e-survey, computer-assisted web interviewing
関連	5	6
概要	The Online Delphi Technique (e-Delphi) is an iterative, web-mediated consensus method in which a geographically dispersed panel of experts responds to successive rounds of structured questionnaires distributed and collected via email or a web platform. Anonymous feedback and controlled statistical summaries are fed back between rounds, guiding panellists toward convergence on priorities, predictions, or recommendations without the social pressures of face-to-face group discussion.	An online survey is a structured data collection instrument hosted on a web platform and completed by respondents via internet-connected devices. It enables large-scale, geographically dispersed data gathering at low cost and with rapid turnaround. Respondents self-administer the questionnaire at their convenience, which reduces interviewer bias and permits automatic data capture. Online surveys are the dominant mode of survey research in social, behavioural, health, and market research today.