Σύγκριση μεθόδων

	Στοχευμένη Συλλογή Δεδομένων	Τεχνική Delphi
Πεδίο	Μεθοδολογία Επισκοπήσεων	Μεθοδολογία Επισκοπήσεων
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1970s–present (formalised by Dillman 1978; expanded to internet surveys 2000s)	1950s–1963
Δημιουργός	Don A. Dillman (Tailored Design Method for mail/remote surveys)	Norman Dalkey and Olaf Helmer (RAND Corporation)
Τύπος	Quantitative / mixed-methods data collection technique	Iterative expert consensus technique
Θεμελιώδης πηγή	Dillman, D. A., Smyth, J. D., & Christian, L. M. (2014). Internet, Phone, Mail, and Mixed-Mode Surveys: The Tailored Design Method (4th ed.). Wiley. ISBN: 978-1118456149	Dalkey, N., & Helmer, O. (1963). An experimental application of the Delphi method to the use of experts. Management Science, 9(3), 458–467.
Εναλλακτικές ονομασίες	distance survey, self-administered remote questionnaire, remote questionnaire, distributed survey	Delphi method, Delphi survey, expert consensus method, iterative expert panel
Συναφείς	6	6
Σύνοψη	A remote survey is a structured data collection method in which respondents complete a questionnaire without the researcher being physically present. Delivered via mail, telephone, email, web platforms, or mobile apps, it enables researchers to reach geographically dispersed samples at relatively low cost. The method is central to social-science, public-health, and organisational research and is codified in Dillman's widely used Tailored Design Method.	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.