Customers are all individual.  Each has their own viewpoint of the ideal product.  How can concensus be achieved?

Academic experts often have divergent ideas on what is the next important subject of research.  How can concensus be achieved?

Project risk management must evaluate the future.  However, how does one evaluate the risks of mutually exclusive options of do:do-nothing when the consequences of each are equally large and equally argued by different managers?

Delphi Method

The Delphi method is a process geared to achieving concensus from situations with a diverse range of opinion.

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Examples

A Delphi study of internet banking

Delphi technique can work for new product development

The future of knowledge management: an international delphi study

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Other references

The Delphi method: techniques and applications (not available as an e-book)

The Delphi method as a research tool: an example, design considerations and applications