What is Delphi Method?
A structured, multi‑round surveying technique that helps a group of informed participants reach a reasoned consensus by collecting anonymised feedback, sharing summary responses, and refining answers over several rounds.
The Delphi Method is an organised way to gather expert or stakeholder judgments on complex or uncertain issues. Participants answer the same set of questions in repeated rounds. After each round a facilitator shares an anonymised summary of responses and key arguments, and participants are invited to revise their answers in light of the group feedback. Over several rounds the group typically converges toward areas of agreement or a clearer mapping of differing views. The method emphasises anonymity, iteration, and controlled feedback to reduce the influence of dominant individuals and groupthink.
Usage example
A council uses a Delphi process to set priorities for local services. They invite community leaders, service staff and bilingual volunteers to complete the same questionnaire in their preferred language. After each round the organiser shares anonymised summaries (automatically translated for reviewers), and participants adjust their priorities until a clear ranking of needs emerges.
Practical application
Delphi is useful when a decision depends on informed judgment rather than hard data — for example forecasting trends, prioritising policy options, or designing service responses. It brings structure to qualitative opinion, reduces the sway of outspoken participants, and produces a defensible record of how consensus (or persistent disagreement) developed. For multilingual projects, a platform that handles translations and presents anonymised summaries back to facilitators reduces administrative overhead and keeps the process inclusive across languages.
FAQ
How is the Delphi Method different from a normal survey?
A normal survey typically collects one‑off responses. Delphi collects responses in multiple iterative rounds, shares anonymised summaries between rounds, and invites participants to revise their views — the goal is informed convergence, not just measurement at a single point in time.
How many rounds does a Delphi process need?
There’s no fixed number; practical projects often run two to four rounds. The process continues until responses stabilise or the facilitator has enough evidence to make a decision.
Does Delphi require experts, and can community members take part?
Delphi is most valuable when participants have relevant knowledge or perspectives, but the group can include practitioners, community representatives or stakeholders. The key is selecting people whose judgement will inform the issue.
Can Delphi work across multiple languages?
Yes — provided responses and round summaries are translated reliably. Multilingual platforms that let participants reply in their preferred language and present facilitators with translated summaries make Delphi more inclusive and easier to run.