To prevent review meetings from becoming about personal opinions, enforce a rule: all criticism must be linked to a testable hypothesis or a clear gap in existing data. This transforms subjective feedback into an objective, evidence-based discussion about what needs to be validated next.

FanDuel CEO Amy Howe adopted this McKinsey principle, which requires even junior employees to voice contrary opinions. This creates an environment where diverse perspectives are heard, ultimately leading to more robust and well-vetted company decisions.

The most effective board chairs facilitate open discussion by asking every member for their assessment on a critical issue *before* sharing their own view. This simple practice prevents groupthink and avoids the risk of directors feeling pressured to conform to the leader's stated opinion.

Disagreements often stem from teams operating with different information. To drive alignment, bring stakeholders together and ensure they are all looking at the same complete dataset. This fosters shared understanding and similar conclusions.

Research shows power degrades empathy, making leaders less objective. A practical system to counteract this is to formally assign a team member the role of 'devil's advocate' for major decisions. This institutionalizes dissent as a process, removing the personal and career risk of challenging authority.

To prevent the first or most senior person from anchoring a conversation, collect everyone's independent analysis in writing first. Only after this information is aggregated should the group discussion begin. This method ensures a wider range of ideas is considered and prevents premature consensus.

When discussing a decision with a group, do not state your own opinion or reveal the outcome if it's already known. This prevents "infecting" them with your belief, which would cause them to reason toward your conclusion rather than exploring the problem objectively.

Counteract the tendency for the highest-paid person's opinion (HIPPO) to dominate decisions. Position all stakeholder ideas, regardless of seniority, as valid hypotheses to be tested. This makes objective data, not job titles, the ultimate arbiter for website changes, fostering a more effective culture.

After the Qwikster failure, Netflix created a framework where executives rate key decisions from -10 to 10 in a shared document. The decision-maker (the "captain") isn't bound by the votes but becomes fully informed of all perspectives, avoiding both groupthink and decision-by-committee.