According to the PMBOK® Guide and the Standard for Project Management, specifically within the Collect Requirements and Perform Integrated Change Control processes, Decision Making involves several formal techniques. PMI explicitly categorizes Majority as a fundamental group decision-making technique.
As per PMI standards, group decision-making is an assessment process having multiple alternatives with an expected outcome in the form of future actions. The four most common voting methods used in group decision-making are:
Unanimity: Everyone agrees on a single course of action.
Majority: Support from more than 50% of the members of the group.
Plurality: The largest block in a group decides, even if a majority is not achieved (used when there are more than two options).
Autocratic: One individual takes responsibility for making the decision for the group.
The other options are incorrect based on the following PMI classifications:
Nominal group technique: This is a Data Gathering technique (or a refinement of brainstorming) that enhances brainstorming with a voting process to rank the most useful ideas for further brainstorming or for prioritization. While it involves voting, it is categorized as a data gathering/representation tool rather than a basic decision-making voting method like " Majority. "
Affinity diagram: This is a Data Representation technique. It allows large numbers of ideas to be classified into groups for review and analysis. It is a way to organize data, not a method to reach a final decision.
Multi-criteria decision analysis: This is a Data Analysis technique that uses a decision matrix to provide a systematic analytical approach for establishing criteria, such as risk levels, uncertainty, and valuation, to evaluate and rank many ideas.
As per the PMI Lexicon of Project Management Terms, the use of group decision-making techniques like Majority ensures that stakeholder engagement is maintained and that the project moves forward with collective buy-in.
