手法を比較

	電話支援型デルファイ法	デルファイ法
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1963 (Delphi); telephone-assisted variant prominent 1970s–1990s	1950s–1963
提唱者	Norman Dalkey & Olaf Helmer (RAND Corporation); telephone adaptation used throughout 1970s–1990s applied research	Norman Dalkey and Olaf Helmer (RAND Corporation)
種類	Iterative expert consensus technique delivered by telephone	Iterative expert consensus technique
原典	Dalkey, N., & Helmer, O. (1963). An experimental application of the Delphi method to the use of experts. Management Science, 9(3), 458–467.	Dalkey, N., & Helmer, O. (1963). An experimental application of the Delphi method to the use of experts. Management Science, 9(3), 458–467.
別名	telephone Delphi, phone-based Delphi, CATI Delphi, telephone consensus method	Delphi method, Delphi survey, expert consensus method, iterative expert panel
関連	4	6
概要	The telephone-assisted Delphi Technique applies the classic iterative expert-consensus framework through structured telephone interviews rather than mailed or online questionnaires. Experts participate in sequential rounds of data collection by phone, enabling the researcher to clarify ambiguous responses in real time and reach consensus on complex, contested, or forward-looking questions without requiring participants to convene in person.	The Delphi technique is a structured, multi-round data collection method that harvests and refines expert opinion through iterative questionnaires and controlled feedback. Developed at RAND Corporation in the 1950s, it is designed to converge a dispersed expert panel toward a reliable consensus on complex, uncertain, or future-oriented questions — without the conformity pressures of face-to-face group discussion.