delphi technique
C1/C2Formal, Academic, Technical
Definition
Meaning
A structured communication method used to achieve a convergence of opinion from a panel of experts through multiple rounds of anonymous questionnaires with controlled feedback.
A systematic, iterative forecasting process that leverages expert judgment, often used in business, public policy, and technology forecasting to address complex problems where precise data is unavailable. The process involves anonymity to reduce bias, multiple rounds to refine views, and statistical aggregation of group response.
Linguistics
Semantic Notes
Always capitalised ('Delphi'). Refers specifically to the methodological process, not the ancient Greek site. It is a proper noun used attributively (Delphi method, Delphi study).
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Both use 'technique' primarily; 'method' and 'process' are also common variants.
Connotations
None specific to region. Carries connotations of rigorous, formal consensus-building.
Frequency
Equally low-frequency in both varieties, confined to specific professional and academic contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] employed the Delphi technique to [verb]...A Delphi technique was conducted among [group] to investigate [topic].The study used a modified Delphi technique involving [number] rounds.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None. It is a technical term.”
Usage
Context Usage
Business
Used for long-range forecasting, risk assessment, and strategic planning, e.g., 'The board used the Delphi technique to predict market trends for the next decade.'
Academic
Common in research methodologies for health policy, education, and technology assessment to formalise expert opinion, e.g., 'We established diagnostic criteria through a Delphi technique involving 20 specialists.'
Everyday
Virtually never used in everyday conversation.
Technical
Core term in futures studies, policy analysis, and clinical guideline development, specifying procedures like number of rounds, anonymity, and feedback reports.
Examples
By Part of Speech
verb
British English
- The team decided to Delphi the strategic priorities. (Note: This verb form is rare and jargonistic, not standard.)
American English
- Researchers plan to Delphi the clinical guidelines over three rounds. (Note: This verb form is rare and jargonistic, not standard.)
adverb
British English
- The opinions were gathered Delphi-style. (Informal)
American English
- They proceeded Delphi-fashion to avoid groupthink. (Informal)
adjective
British English
- The Delphi-derived consensus was published in the report.
American English
- We followed a Delphi-based approach for the forecast.
Examples
By CEFR Level
- The word 'Delphi' is the name of an old Greek city and also a modern research method.
- Scientists sometimes ask many experts for their opinions using a special method called the Delphi technique.
- To predict future trends in renewable energy, the consultancy firm employed the Delphi technique with a panel of twenty international experts.
- The modified Delphi technique utilised in the study comprised two questionnaire rounds, with anonymised feedback provided between them to refine the group's judgment on the ethical implications.
Learning
Memory Aids
Mnemonic
Think of the ancient Oracle of Delphi, who provided wise prophecies. The modern 'Delphi technique' seeks prophecy (forecasts) from a panel of modern 'oracles' (experts).
Conceptual Metaphor
CONSENSUS IS A CONVERGING PATH (multiple rounds guide experts towards a single point).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'Delphi' as 'Дельфины' (dolphins). It is a transliteration: 'Метод Дельфи' or 'Дельфийский метод'.
- Do not confuse with the city Дельфы; in this context, it is a branded methodology name.
- The word 'technique' here means 'методика' or 'метод', not just 'техника' (as in skill).
Common Mistakes
- Incorrect capitalisation: writing 'delphi technique' (should be 'Delphi').
- Using it as a verb, e.g., 'We will delphi this issue.' (Incorrect; you 'use the Delphi technique on' an issue).
- Confusing it with a simple survey or one-round questionnaire.
Practice
Quiz
What is a defining characteristic of the Delphi technique?
FAQ
Frequently Asked Questions
It is named after the Ancient Greek Oracle of Delphi, metaphorically suggesting the method seeks to obtain informed prophecy or foresight from a group of experts.
It is primarily a qualitative method that often uses quantitative measures (like Likert scales and statistical aggregation of responses) to analyse and represent the group's consensus.
Key advantages include reducing bandwagon and halo effects through anonymity, allowing experts to revise their views privately, and systematically synthesising diverse expert opinions from a geographically dispersed panel.
There is no fixed number, but classical Delphi studies often use two to four rounds. The process continues until a pre-defined stop criterion is met, such as consensus stability or a set number of rounds.