手法を比較

	オンライン・デルファイ法（e-Delphi）	オンライン構造化面接
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	Late 1990s–2000s (with widespread adoption post-2010)
提唱者	Olaf Helmer, Norman Dalkey, Nicholas Rescher (RAND Corporation); online adaptation emerged in the 1990s–2000s	Emerged from structured interview methodology adapted for internet-mediated communication
種類	Iterative expert consensus method (online)	Quantitative/standardized 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.	Salmons, J. (2015). Qualitative Online Interviews: Strategies, Design, and Skills (2nd ed.). Sage Publications. ISBN: 978-1452283500
別名	e-Delphi, electronic Delphi, web-based Delphi, internet Delphi	web-based structured interview, virtual structured interview, digital structured interview, e-interview (structured)
関連	5	4
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 structured interview applies the classical structured interview protocol — a fixed set of predetermined questions asked in a fixed order — via internet-mediated channels such as video conferencing, synchronous chat, or email. Every participant receives the exact same questions, enabling systematic comparison across respondents while eliminating geographic barriers. It combines the standardization benefits of face-to-face structured interviewing with the reach, cost efficiency, and scheduling flexibility of online data collection.