Thank You, Bain: The Rule of Seven and the Meetings That Finally End

Ninety minutes. Eleven people. Four agenda items. Zero decisions.

Everyone in that room could feel the meeting failing, and everyone stayed polite about it, because nobody knew which of them was the problem.

It was arithmetic.

Not many people feel moved to thank a consulting firm. Bain & Company earned one from me, because a finding they published changed how I run every meeting I am responsible for.

What is the Rule of Seven?

In 2010, Bain & Company published Decide and Deliver, their research into what separates organisations that decide well from those that stall. Inside it sits the Rule of Seven: once a decision making group has seven people, every additional person cuts decision effectiveness by about 10 per cent. By 17, deciding all but stops. Researchers have found versions of the same pattern for decades, in psychology labs and national cabinets alike, but Bain gave it a number a business owner can act on.

Fewer people in the room. The right people in the room.

Why wasn’t I in that meeting?

The first time I applied the rule deliberately, a team member pulled me aside afterwards and asked exactly that. The meeting affected her. She had not been invited.

Fair question. So we walked through it together. What was the meeting for? A decision, not an update. And who was in the room? Her manager, carrying her team’s numbers, her concerns, and the two suggestions she had raised that very week.

Her voice was in the meeting. She just didn’t have to be.

She got it immediately, because she had sat through enough of the ninety minute variety where nothing got decided. Being represented feels uncomfortable at first because it looks like being left out. A good spokesperson carries your voice into the room and carries the decision back out to you. My colleague had both that day, and the meeting ended with an outcome instead of a sequel.

How do you apply the Rule of Seven?

Before the invitations go out, write two lists. The people who need to make this decision, and the people who need to hear about it. The first list gets a seat, seven at most. The second list gets a clear message afterwards, carried by someone who was in the room. Mixing the lists doesn’t improve the decision. It just lengthens the meeting.

Anyone moved from the first list to the second deserves the conversation my colleague got: what the meeting is for, and who is carrying their voice. Done well, people stop hearing exclusion and start hearing that their input travels further than their calendar does.

Quick answers

How many people should be in a decision making meeting?

Seven or fewer, based on Bain’s 2010 research. Past seven, each extra person cuts decision effectiveness by about 10 per cent.

What if someone feels left out of a meeting that affects them?

Tell them what the meeting was for and who carried their voice. Representation works when it is visible. It fails when people have to guess.

Are big meetings ever the right call?

For gathering input and communicating outcomes, the more the better. Size only becomes a cost when the group is trying to decide.

Decide with fewer. Communicate with everyone. And if your calendar is wall to wall with meetings that end in another meeting, I would love to be the person you think out loud with. #GetGroundedWithGrace