Delphi consensus is agreement assessed using predefined rules after independent ratings, structured feedback, and an opportunity to reconsider. Explore the consensus process and criteria, expert panels, and modified Delphi method in our research guides.
Explore our latest practical guidance on Delphi studies, questionnaires, and structured group decisions.
A practical record of design, participation, feedback, and decisions
Document the panel, item development, planned sample size, rounds, feedback, consensus rules, attrition, revisions, and results so readers can understand and reproduce the process.
A 51% decision rule can settle a vote without demonstrating strong agreement
Learn why Delphi consensus usually needs more than a bare majority, how thresholds should be chosen before results are reviewed, and what else to examine besides one percentage.
From independent expert input to a usable risk register
A practical workflow for finding overlooked risks, clarifying assumptions, and deciding what needs further investigation.
What the Delphi method is, why it works for expert consensus, and how it differs from the surveys and adaptations it is often confused with.
Next: Study design & panelsLearn how the Delphi method helps researchers and organizations gather expert input, refine opinions over multiple rounds, reduce groupthink, and measure consensus in a structured and transparent way.
Understand why Delphi is useful for reducing dominant voices, encouraging independent judgment, supporting structured feedback, measuring consensus, and creating a transparent record of expert input.
Learn how Delphi studies differ from traditional surveys and why expert consensus often requires structured feedback, multiple rounds, participant reflection, and clear consensus criteria.
Learn what modified Delphi studies are, how they differ from traditional Delphi, and how teams can adapt the method while preserving transparency, credibility, and clear reporting.
Decisions to make before the first round opens: who sits on the panel, how many experts you need, and which pitfalls weaken a study.
Next: Consensus & analysisA practical guide to planning expert panels, Delphi rounds, rating scales, structured feedback, consensus thresholds, administration, analysis, and reporting before launching a study.
Why panel-size justification matters more than a universal minimum
Plan panel size around the research question, required expertise and stakeholder perspectives, expected attrition, and intended analyses—and report the rationale transparently.
Overall consensus and stakeholder consensus answer different questions
A pooled percentage gives every participant equal weight. See when the largest group can decide the result even if smaller, essential groups disagree—and how to analyze and report by stakeholder group.
Learn common Delphi study mistakes and how to avoid problems with unclear objectives, weak panel design, poor item wording, undefined consensus criteria, and weak feedback workflows.
A practical resource for planning and transparent reporting
Review panel composition, stakeholder representation, scales, consensus rules, feedback, attrition, analysis, and transparent reporting decisions before and after your study.
A practical record of design, participation, feedback, and decisions
Document the panel, item development, planned sample size, rounds, feedback, consensus rules, attrition, revisions, and results so readers can understand and reproduce the process.
How to define agreement, judge items on more than one dimension, and report disagreement honestly when it does not resolve.
Next: Real-time, hybrid & live formatsLearn how Delphi study teams define consensus thresholds, interpret agreement and disagreement, compare stakeholder groups, and report consensus criteria clearly.
A 51% decision rule can settle a vote without demonstrating strong agreement
Learn why Delphi consensus usually needs more than a bare majority, how thresholds should be chosen before results are reviewed, and what else to examine besides one percentage.
Clarity, importance, feasibility, validity, and appropriateness may require separate decisions
Learn when an item should be evaluated on more than one dimension, how to predefine multidimensional acceptance rules, and how to report which criterion caused an item to pass, fail, or require revision.
Recognizing stable polarization and context-dependent consensus
Learn when persistent disagreement represents meaningful competing positions—and why a defensible Delphi should preserve them rather than force one artificial conclusion.
Choosing between asynchronous rounds, Real-Time Delphi, and facilitated live sessions—or combining them so each is used where it is strongest.
Next: Applications & fieldsLearn how Real-Time Delphi allows participants to review feedback and refine responses while a study is still active, helping teams build consensus more flexibly and efficiently.
Use each Delphi format where it is strongest
Learn how to combine asynchronous rounds, dynamic feedback, and a focused live session while preserving independent judgment, controlled feedback, iteration, and transparent reporting.
A structured alternative to long, uneven, and difficult meeting discussions
Learn how a Surveylet Live Consensus Session can help conferences, workshops, advisory boards, committees, and leadership groups collect independent input, share anonymized feedback, and document a decision during the meeting.
Delphi at work: clinical consensus and core outcome sets, appropriateness ratings, and expert judgment in fields well beyond healthcare.
Next: Questions, risks and group decisionsClinical consensus, core outcome sets, care guidance, and research priorities
See how Delphi studies support medical research, including clinical consensus, core outcome sets, quality indicators, care pathways, public health, and publication-ready reporting.
Case-based appropriateness ratings under controlled comparison
Appropriateness decisions often depend on context. A case-based RAND/UCLA design lets experts rate a realistic base scenario, then test how controlled changes affect the median, disagreement, and final classification.
Explore how Delphi and Real-Time Delphi studies can support structured expert consensus in fields beyond medicine, including policy, education, space, technology, forecasting, and strategic planning.
Practical examples for writing Delphi questions, identifying risks, and choosing software for structured group decisions.
From independent expert input to a usable risk register
A practical workflow for finding overlooked risks, clarifying assumptions, and deciding what needs further investigation.
Example questions, rating scales, and follow-up feedback
Adapt an original example covering first-round questions, participant instructions, follow-up feedback, and consensus rules.
Match the tool to your group decision process
Match the software to the decision process, then use a concrete demonstration checklist to assess whether it fits.
Surveylet helps researchers and organizations manage expert panels, multiple rounds, structured feedback, Real-Time Delphi workflows, and live consensus-oriented decision-making during conferences and meetings.