手法を比較

	トライアンギュレーション・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	Delphi: 1963; triangulation integration: 1970s–1990s	1950s–1963
提唱者	Norman Dalkey & Olaf Helmer (Delphi); triangulation principle from Norman Denzin	Norman Dalkey and Olaf Helmer (RAND Corporation)
種類	Expert-consensus data collection with multi-method validation	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	Delphi with triangulation, mixed-method Delphi, multi-method Delphi, triangulation-enhanced Delphi	Delphi method, Delphi survey, expert consensus method, iterative expert panel
関連	5	6
概要	The Triangulated Delphi Technique combines the structured expert-consensus process of the classic Delphi method with deliberate triangulation — integrating data from at least one additional source or method (e.g., systematic literature review, interviews, survey data) to cross-validate findings and enhance the credibility of expert judgments. It retains the iterative, anonymous, multi-round panel format while embedding verification steps that reduce reliance on panel consensus alone.	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.