https://www.bain.com/insights/effective-decision-making-and-the-rule-of-7/
Effective decision making and the rule of 7 | Bain & Company
Jan 23, 2020 - Once you've got 7 people in a decision-making group, each additional member reduces decision effectiveness by 10%.
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https://www.umaryland.edu/cpa/rule-of-seven/
Marketing Rule of 7 - Communications and Public Affairs
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