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PPT : Strengths of the Delphi Technique
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*The technique is flexible enough to be applied in a variety of situations and to a wide range of complex problems, for which there is often no other suitable means of analysis
* The iterative approach allows experts to reconsider their judgements in the light of feedback from peers
* The process also gives participants more time to think through their ideas before committing themselves to them, leading to a better quality of response
* The anonymity of the approach enables experts to express their opinions freely, without institutional loyalties or peer group pressures getting in the way
Strenghts of the Delphi Technique
* The potential influence of personality is also removed in this way
* Redundant ‘noise’ (issues that tend to side-track the debate) can be controlled by the project manager
* The process generates a record of the group’s thoughts, which can be reviewed as required
* The method can be used to evaluate the spread of opinion as well as consensus points.
Weaknesses of the Delphi Technique
* Delphi can be extremely sensitive to:
o the level of panellists’ expertise
o the composition of the panel
o the clarity of the questions
o the way in which the project manager reports reasons for outliers
o the administration of the questionnaire
* It assumes that experts are willing to allow their judgements to be re-formed by the opinions of others
* Expert panel is vulnerable to high rates of attrition due to:
o boredom with the subject matter
o disillusionment with the process, and/or
o lack of time to complete the questionnaire before the following round commences
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