Too Many Cooks or Many Heads?

Two familiar sayings offer completely different advice about working with other people:

Both have endured because both contain some truth. Sometimes another perspective transforms our understanding of a problem. At other times, adding more people simply makes the work slower, less clear and harder to coordinate.

The interesting question is not which saying is right, but when each becomes right. As with problem-solving itself, the answer starts with understanding the nature of the problem.

Deep expertise is powerful for good reason. Experienced specialists do not simply accumulate information; over time they develop a richer cognitive repertoire of knowledge, pattern recognition, mental models, heuristics and memories of what has and has not worked before. This allows them to recognise familiar situations quickly, interpret information efficiently and act without reconstructing every problem from first principles.

For many well-defined problems, this is exactly what high performance looks like. The nature of the problem is reasonably clear, the relevant knowledge sits largely within one domain and credible solution pathways already exist. In these circumstances, one capable specialist may be more useful than a group. Adding people can increase communication and coordination demands without materially improving the response.

Sometimes too many cooks really do spoil the broth.

Expertise, however, also has boundaries. The same professional knowledge and experience that enable someone to interpret a situation quickly influence what they notice, what they consider important and how they understand the problem. An engineer, clinician, coach, accountant or strategist might each be highly expert while interpreting the same situation differently.

For a well-defined problem, this may matter very little. If the problem sits comfortably within one person’s expertise, widening the conversation may add little value. As problems become more ill-defined or complex, however, cause and effect become harder to separate, several explanations may be plausible and relevant knowledge may sit across different parts of an organisation. The likelihood that one person holds everything required to understand the situation begins to fall.

At that point, the question is no longer simply how much expertise we have. It is whether the problem has access to the right range of thinking.

More experts does not necessarily mean more ways of thinking

Imagine putting five highly experienced people from the same professional background around a table. Between them there may be decades of experience and enormous technical capability, yet their education, assumptions and ways of interpreting the problem may be remarkably similar.

Now consider people who bring genuinely different knowledge, experiences, mental models and ways of reasoning. They may notice different things, challenge established explanations, reveal blind spots and generate possibilities that would be difficult to reach from one perspective.

That is the potential value of cognitive diversity.

But more people do not automatically mean more cognitive diversity, and cognitive diversity itself does not guarantee better outcomes.

My research with multidisciplinary practitioners captured this tension particularly well. People valued the broader perspectives and stronger problem-solving that different expertise could provide, while also describing slower progress, excessive discussion, personality and ego issues, and difficulties maintaining clarity and alignment.

Their observation was telling: cognitive diversity is important, but not if it slows us down.

Collaboration is not the goal

This tension matters because collaboration has become an almost unquestioned organisational virtue. It appears in job descriptions, values statements and leadership frameworks. Meetings are created to encourage it and people are increasingly expected to demonstrate that they are collaborative regardless of the task in front of them.

The intention is understandable. Access to other people’s knowledge can help us solve difficult problems. But collaboration is not a panacea; it is a way of organising expertise, and its value depends on what the situation requires.

Sometimes several people genuinely need to think together because the problem is ill-defined, relevant knowledge is distributed and no individual possesses a sufficient understanding of what is happening. In these situations, interaction between different perspectives can change how the problem itself is understood.

At other times, there may be no collective problem to solve. There may simply be a decision that belongs to one accountable actor. A leader may need to choose between priorities, a coach may need to select a course of action, or a manager may need to approve a proposal. Others may hold useful information and should be consulted where relevant, but consulting expertise is not the same as sharing every decision.

When every choice becomes a collaborative exercise, we risk adding voices without adding useful cognition. Accountability becomes blurred, coordination increases and people contribute because they have been invited rather than because their expertise is relevant.

The better question is not, How can we collaborate more? It is, What does this problem or decision require from other people?

The right minds for the problem

For a relatively well-defined problem, where one person’s expertise and cognitive repertoire are sufficient, an individual or specialist response may be entirely appropriate. Where the problem is more ill-defined or complex and relevant knowledge is distributed across domains, cognitive diversity can become increasingly valuable.

Even then, assembling experts is not enough. Diversity represents potential capability. That capability only becomes useful when people can make their knowledge accessible to one another, question assumptions and integrate relevant contributions. An organisation may therefore possess all the expertise necessary to solve a problem while still being unable to use it effectively.

This is where Blended Intelligence shifts the conversation away from how many experts we have and towards how expertise is mobilised around the problem.

The aim is not maximum expertise, maximum diversity or maximum collaboration. It is to understand the problem well enough to determine what knowledge and ways of thinking it requires, who possesses them and how much interaction between those people is actually necessary.

Sometimes that means trusting one expert. Sometimes it means consulting several. Sometimes it means coordinating different specialists without asking them to solve the problem collectively. And sometimes an ill-defined or complex problem genuinely requires different perspectives to be surfaced, challenged and integrated because no single view is sufficient.

Both sayings, then, can be right. Too many cooks can spoil the broth, and many heads can be better than one.

The value is not in having more minds. It is in knowing when the problem needs them.