The Rule of Seven for meetings | Blenko, Mankins, Rogers (2010)

Meeting effectiveness is reduced after 7 people are involved, say @BainInsights consultants #Blenko, #Mankins, #Rogers.

Follow the Rule of Seven for meetings. Who should come to a meeting is always a sensitive issue, and the basic precept is often “The more the merrier.” But more is rarely better when it comes to making decisions. Our research highlights what we might call the Rule of Seven: every person added to a decision-making group over seven reduces decision effectiveness by 10 percent. If you take this rule to its logical conclusion, a group of seventeen or more rarely makes any decisions. Of course, a larger group may sometimes be necessary to ensure buy-in. But organizations trying to make important decisions should limit the size of group as much as possible.

Blenko, Mankins and Rogers (2011), p. 88

Source: Blenko, Marcia W., Michael C. Mankins, and Paul Rogers. Decide & deliver: 5 steps to breakthrough performance in your organization. Harvard Business Press, 2010. [Google Books]

Bain Insights:  Effective decision making and the rule of 7
Bain Insights: Effective decision making and the rule of 7
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#team-size