When consensus hurts the company

Paper highlights

Consensus sounds prudent, but requiring more agreement changes the errors a group makes. Unanimity blocks many bad proposals, yet it also blocks many good ones. A lower approval threshold lets more opportunities through, at the cost of more mistaken approvals.

The article turns this statistical trade-off into a practical question: before deciding the issue, decide which kind of mistake the organization can least afford. There is no generally correct consensus level independent of that choice.

Deciding how to decide

• Use a high consensus threshold when a commission error—approving a bad proposal—could cause disproportionate harm. Giving each member a veto makes approval rare.
• Use a lower threshold when an omission error—missing a good proposal—is the greater threat. Allowing one member or a small subgroup to proceed increases experimentation.
• Use majority rule when the two errors have more similar costs and an intermediate position is appropriate.

The same organization may need different rules for different decisions. A large acquisition, a product-safety change, and a portfolio of early R&D experiments do not have the same error costs.

Evidence behind the recommendation

The logic comes from models of fallible decision-making and is illustrated with evidence from more than 100,000 mutual-fund stock selections: funds requiring agreement missed more good investments, while funds allowing managers to act independently selected more stocks that later performed poorly.

Discussion quality and the rule that converts judgments into action are separate. A team can debate thoroughly and still use a low approval threshold; another can require unanimity after little discussion. Consensus is therefore not synonymous with participation, care, or decision quality.

The threshold should be set before the group knows which proposal it will evaluate. An ex ante rule makes the organization’s tolerance for the two errors explicit and prevents members from adjusting the standard to favor a preferred outcome.

How to use this article

Cite this for

• A practitioner-facing explanation of how consensus thresholds change organizational error patterns.
• The recommendation to choose decision rules by comparing omission and commission costs.
• A short bridge from formal organization-design logic to board and top-team decisions.

Useful for teaching

• Why consensus is an approval rule, not a synonym for careful discussion or participation.
• How different decisions in the same organization may need different thresholds.
• Why the threshold should be chosen before the group knows which proposal it is evaluating.

Careful claim

Consensus can reduce mistaken approvals while increasing missed opportunities; the right level of agreement depends on the relative cost of those two errors.

Abstract

Boards and top management teams often try to gain consensus about important decisions. New research offers insights into when that’s the right course, when it isn’t—and how leaders can determine the best form of decision making for a given situation.

Other links

• SSRN preprint

Last updated 2026-06-21