Group Decision-Making Methods

 

Group Decision-Making Methods

Link to image courtesy of UpRaise 2024

Delphi Technique (Structured Iterative Process)

The Delphi Method is a structured technique that involves a panel of strategically selected experts discussing a complex topic and is NOT considered open-ended in the sense of allowing completely unrestricted and unguided responses (RAND, 2024). It simplifies the complexity of a topic by leveraging the collective opinion of the experts to involve three groups: the anonymous experts who prepare, distribute, collect, and summarize questionnaires, the experts on the subject who provide their responses, and the facilitators who manage the process. One of the key characteristics of the Delphi Method is the anonymity of the experts, ensuring that opinions are based solely on the ideas presented in the consultation, rather than personal biases or influence. The method involves iterative rounds of questionnaires, allowing for controlled feedback and refining of responses (Twin, 2023). The group responses are analyzed statistically, reflecting the degree of agreement among the experts. The panel of experts is heterogeneous, with representatives from different branches of activity to ensure a diverse and reliable sample. 

Pros and Cons

While the Delphi Method has several advantages, such as collecting expert insights and reaching consensus, it also has a few disadvantages. On the positive side, the technique harnesses the collective wisdom of the experts, reduces bias, and allows for the exploration of complex topics. However, it can be time-consuming and expensive to gather and manage the panel of experts (Question Pro, 2024). Also, the method may be limited by the availability and willingness of experts to participate. The Delphi Method is a powerful technique for gathering expert opinions and reaching consensus on complex topics by leveraging anonymity, controlled feedback, and statistical analysis to provide qualitative insights. While it has advantages in decision-making, it also has drawbacks such as resource requirements and potential limitations in expert participation.

Nominal Group Technique (Open-ended Semi-Structured/Brainstorming)

The Nominal Group Technique (NGT) is a semi-structured "Round-Robin" approach that aims to encourage equal participation and generate consensus within a group through brainstorming techniques (Tague, 2005). In the NGT, participants are brought together to brainstorm ideas individually and then share them with the group. Each participant takes turns presenting their ideas, and these ideas are recorded and displayed for everyone to see. This process ensures that all ideas are considered and prevents any one individual from dominating the discussion. Once all ideas have been shared, the group engages in a structured discussion to clarify and further develop the ideas. This allows for a deeper understanding of each idea and helps the group to identify any similarities or overlaps among the suggestions.

Pros and Cons

The Nominal Group Technique (NGT) offers several advantages in the decision-making process. It promotes equal participation and ensures that all ideas are considered, preventing dominant individuals from overshadowing others. NGT encourages collaboration and consensus-building, leading to a sense of ownership and commitment to the final decision. The semi-structured nature of NGT helps to prioritize ideas and identify the ones that have the greatest consensus. However, NGT can be time-consuming, especially in larger groups, and may require skilled facilitation to keep the process on track. The technique may also be limited by the influence of group dynamics and biases, potentially hindering the generation of innovative ideas (Knowledgehut, 2024). Nonetheless, when implemented effectively, NGT can be a valuable tool for inclusive and well-informed decision-making.

Comparison Analysis

The Nominal Group Technique (NGT) and the Delphi Method are both structured group decision-making techniques that aim to gather input from multiple participants and reach a consensus. While they share some similarities, there are also notable differences in their processes and applications. Both NGT and Delphi involve a group of experts or stakeholders providing their input on a particular topic. However, the key difference lies in the level of interaction and anonymity (Question Pro, 2024). In NGT, participants gather in a face-to-face setting (brainstorming) and individually generate ideas, which are then shared with the group. The group discusses and evaluates the ideas, leading to a collective decision. In contrast, the Delphi Method involves a series of questionnaires or surveys sent to participants anonymously. The responses are compiled and shared with the group for further rounds,  towards a consensus.

Another difference is the level of structure and guidance in the two methods. NGT provides more freedom for participants to generate ideas, as they are not limited by predetermined options or closed-ended questions. This open-ended nature of NGT encourages creativity and allows for a wide range of ideas to be considered. On the other hand, the Delphi Method typically provides specific questions or prompts to guide the experts' responses. The structured nature of the Delphi questionnaires helps focus the discussion on specific aspects of the topic and facilitates the convergence of opinions. 

A final differing factor is the level of interaction and feedback between NGT and the Delphi technique. NGT encourages face-to-face interaction among participants during the idea generation and discussion phases. Participants can build upon each other's ideas and engage in clarifications and debates. In contrast, the Delphi Method relies on anonymous feedback, reducing bias and minimizing the influence of dominant individuals. The method provides controlled feedback to participants in subsequent rounds, allowing them to revise their opinions based on the collective input. Koksalmis & Kabak (2019, p.146) states that the effectiveness of the decision-making process is primarily determined by factors such as the nature of the problem, the specific context in which it arises, and, most importantly, the capabilities and expertise of the decision makers involved in the relevant field.

All in all, in the event of an emergent threat, a structured approach is the best option. An example is the global emergency response by the World Health Organization (WHO) to employ the structured approach of the Delphi method regarding the global COVID-19 pandemic to expedite a global vaccine. In the case of evaluating the effectiveness of a counter-measure drug, the WHO assembled a diverse group of global medical experts who specialized in treating the specific class of the virus (Question Pro, 2024). An initial step in this process would be for each expert to provide their individual opinion on a specific vaccine's effectiveness, without any influence from others or facial recognition. By collecting opinions anonymously, the Delphi technique ensures that experts can freely express their views without the fear of judgment or pressure to conform in a structured and concise manner.

Summary

When it comes to future and innovation development, both open-ended and structured approaches have their merits. Open-ended approaches, such as brainstorming, encourage the generation of a wide range of ideas and foster creativity and collaboration. They allow for the exploration of different perspectives and can lead to innovative solutions. On the other hand, structured approaches provide a more concise framework for organizations requiring an emergent response to the decision-making process. Both frameworks help set and prioritize terms and conditions for innovation to thrive, and they can ensure that ideas are evaluated and implemented effectively. In the context of future and innovation development, organizations often employ a combination of both approaches (Jain, 2023). Open-ended techniques like brainstorming can be used to generate a diverse set of ideas and stimulate creativity. These ideas can then be evaluated and refined using structured approaches, such as strategic planning, market research, or semi-structured interviews. By combining the strengths of both approaches, organizations can benefit from the creativity and exploration of open-ended techniques while ensuring that ideas are thoroughly evaluated and aligned with strategic goals.

References

Jain, N. (2023). Innovation framework? Definition, types, process and best practices. IdeaScale, published article. HTML. https://ideascale.com/blog/what-is-innovation-framework/#:~:text=An%20innovation%20framework%20is%20defined,and%20intentional%20pursuit%20of%20innovation. 

Knowledgehut (2024). Nominal group technique (NGT): Stages, benefits, examples. UpGrad Knowledgehut, published article. HTML. https://www.knowledgehut.com/blog/project-management/nominal-group-technique

Koksalmis & Kabak (2019). Deriving decision makers’ weights in group decision making: An overview of objective methods. Information Fusion 49, pp.146-160. Science Direct Elsevier. Published journal. PDF. https://www-sciencedirect-com.coloradotech.idm.oclc.org/search?qs=Deriving%20decision%20makers%E2%80%99%20weights%20in%20group%20decision%20making%3A%20An%20overview%20of%20objective%20methods

Question Pro (2024). Delphi method. Question Pro Market Research, published article. HTML. https://www.questionpro.com/blog/delphi-method/#:~:text=Brainstorming%3A%20Involves%20group%20sessions%20where,collective%20creativity%20and%20idea%20generation.

RAND Corporation. (Accessed 2024). Delphi Method. Colorado Technical University Student Resources. Published document. HTML. Retrieved February 28, 2024 from: https://www.rand.org/topics/delphi-method.html

Tague, N. (2005). The Quality Toolbox, Third Edition. ASQ Quality Press. Published novel, abstract. HTML. https://asq.org/quality-press

Twin, A. (2023). Delphi method forecasting: Definition and how it is used. Investopedia, published article. HTML. https://www.investopedia.com/terms/d/delphi-method.asp