手法を比較

	デルファイ法	コンテンツ分析
分野	調査方法論	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1950s–1963	Systematised through Krippendorff's methodology work; 4th edition 2018
提唱者	Norman Dalkey and Olaf Helmer (RAND Corporation)	Klaus Krippendorff (systematic formulation); roots in early 20th-century communications research
種類	Iterative expert consensus technique	Qualitative / mixed-method research 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.	Krippendorff, K. (2018). Content Analysis: An Introduction to Its Methodology (4th ed.). Sage. ISBN: 978-1506395661
別名	Delphi method, Delphi survey, expert consensus method, iterative expert panel	İçerik Analizi, systematic content coding, quantitative content analysis
関連	6	5
概要	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.	Content analysis is a systematic research technique for reducing text, visual, or media material into coded categories so that patterns can be counted, compared, and interpreted. Formalised by Klaus Krippendorff in his widely cited methodology textbook (latest edition 2018), the method sits at the boundary of qualitative and quantitative inquiry: it imposes structured, replicable coding on inherently meaning-laden material.