Сравнение на методи

	Многоизточникова техника Делфи	Изследване чрез фокус групи	Техника на номиналната група
Област	Методология на проучванията	Качествени методи	Качествени методи
Семейство	Process / pipeline	Process / pipeline	Process / pipeline
Година на възникване	1975–2000s	1940s (sociological origin); modern applied form from the 1980s–1990s	1971
Създател	Extension of the classic Delphi method; multi-source framing attributed to diverse practitioners building on Linstone & Turoff (1975)	Robert K. Merton (sociological precursor, 1940s); popularised in applied research by Richard A. Krueger	André L. Delbecq and Andrew H. Van de Ven
Тип	Structured consensus-building technique	Qualitative data collection method	Qualitative research method
Основополагащ източник	Linstone, H. A., & Turoff, M. (Eds.). (1975). The Delphi Method: Techniques and Applications. Addison-Wesley.	Krueger, R.A. & Casey, M.A. (2014). Focus Groups: A Practical Guide for Applied Research (5th ed.). Sage. ISBN: 978-1483365244	Delbecq, A. L., & Van de Ven, A. H. (1971). A group process model for problem identification and program planning. Journal of Applied Behavioral Science, 7(4), 466–492.
Други названия	Multi-stakeholder Delphi, Diverse-panel Delphi, Multi-group Delphi, MSDT	focus group discussion, FGD, group interview, Odak Grup Araştırması	NGT, structured group process, nominal group process, priority-setting group method
Свързани	3	6	6
Резюме	The Multi-source Delphi Technique is a structured, iterative consensus-building method that deliberately recruits expert panellists from multiple, distinct stakeholder groups or knowledge sources. By ensuring that no single professional community or institution dominates the panel, it reduces homogeneity bias and captures a broader range of perspectives than a conventional single-group Delphi. Panellists respond anonymously across successive rounds, receiving aggregated group feedback between rounds until consensus or a stable level of agreement is reached.	Focus group research is a qualitative data-collection method in which a trained moderator guides structured discussions with homogeneous groups of six to ten participants to explore ideas, attitudes, and perceptions on a defined topic. Developed from sociological roots in the 1940s and systematised for applied research by Krueger and Casey, the method leverages group interaction as a data source — revealing not just what people think, but how they negotiate and articulate views in a social setting.	The Nominal Group Technique (NGT) is a structured group facilitation method designed to generate and prioritise ideas, problems, or solutions while ensuring equal participation from all members. Developed by Delbecq and Van de Ven in 1971, it combines silent individual idea generation with structured group discussion and systematic voting to produce a ranked list of priorities. Unlike unstructured focus groups, NGT prevents dominant voices from suppressing quieter participants, making it especially valuable for needs assessment, program planning, and stakeholder priority-setting in applied research and policy contexts.