Leadership Assumptions in Strategy with LEGO® SERIOUS PLAY®

In many organisations, strategy problems rarely stem from a simple lack of effort. Instead, they originate from hidden assumptions. Frequently, leaders believe they are discussing objective facts, clear priorities, and strategic direction.

However, deep underneath those conversations lie unspoken beliefs. These cover what truly matters, what success looks like, and how change actually happens. Consequently, this is exactly why leadership assumptions matter.

When assumptions remain invisible, they quietly shape daily decisions, communication, and execution. Therefore, teams move forward falsely believing they are perfectly aligned. In reality, they may act from entirely different mental models. Over time, this misalignment creates deep confusion, slows decision-making, and inevitably leads to strategic drift.

What Leadership Assumptions Are

Leadership assumptions represent the core beliefs leaders hold about the organisation. Specifically, these beliefs cover how the company works, what drives tangible results, and which factors genuinely deserve attention.

Certainly, some assumptions prove highly useful. They help leaders make decisions quickly and act with absolute confidence. However, some assumptions become completely outdated. Furthermore, others never undergo proper testing in the first place. In complex environments, relying on untested assumptions becomes incredibly risky. Consequently, teams build critical decisions on ideas that no longer fit current reality.

For example, a leadership team might firmly assume:

Ultimately, these assumptions may be true, partly true, or entirely false. The main problem is not that assumptions exist. Rather, the main problem is that they typically remain totally invisible.

Why Assumptions Affect Strategy

Teams never build strategy exclusively from raw data. In reality, interpretation heavily shapes strategy as well.

For instance, two executive teams can examine the exact same market conditions. Yet, they often make wildly different decisions. This happens simply because leaders interpret risk, opportunity, and organisational capability entirely through their own personal assumptions.

This dynamic matters immensely because assumptions directly influence:

• Exactly what leaders notice.
• Specifically what they ignore.
• Which options actually feel realistic.
• Exactly how the team defines urgency.
• Precisely how the business measures success.

The Cost of Untested Assumptions

Make no mistake, untested assumptions prove incredibly expensive.

Firstly, they easily delay implementation. Secondly, they severely weaken collaboration. Finally, they often produce strategies that look highly coherent on paper but fail completely under pressure. In practice, this failure typically manifests as repeated rework, totally unclear ownership, and heavily mixed messages from leaders. Often, promising initiatives abruptly lose momentum right after launch.

In senior teams, even a tiny gap in assumptions creates massive downstream effects. Why? Because leadership communication directly influences the entire organisation. For example, if one group quietly assumes a transformation should remain cautious, while another assumes rapid speed is the top priority, daily execution quickly becomes inconsistent.

Ultimately, a strategy does not fail solely when the core idea is wrong. It also fails catastrophically when the assumptions operating beneath it prove weak.

Why Normal Strategy Conversations Miss the Issue

Traditional strategy sessions rely almost entirely on open discussion, static slides, and intense verbal debate. While these methods offer some value, they clearly have hard limits.

Typically, people speak in highly polished summaries. Furthermore, they aggressively defend their positions long before fully exploring them. Additionally, senior voices inevitably shape the overall direction far too early. Meanwhile, abstract ideas remain frustratingly abstract. As a direct result, the real, raw thinking behind critical decisions rarely becomes fully visible.

This dynamic proves especially true when assumptions carry heavy emotional, political, or historical weight. Often, leaders do not even realise they are making these assumptions. Therefore, serious assumption work desperately needs a better method. Specifically, teams need a method that actively slows thinking down, makes ideas visible, and gives every single person a highly structured way to contribute.

How LEGO® SERIOUS PLAY® Helps

The LEGO® SERIOUS PLAY® Method actively helps leaders surface deep assumptions. Specifically, it achieves this by turning internal thinking into concrete, physical models.

Instead of simply talking aimlessly about what drives success, leaders physically build representations of how they believe the system works. They actively build factors, relationships, barriers, key dependencies, and future risks. Consequently, this fundamentally changes the conversation. People no longer react merely to opinions. Instead, they objectively examine models.

When a leader builds a model, they inadvertently reveal the hidden logic underneath their personal view. Then, other participants can safely ask questions, comfortably compare perspectives, and easily identify patterns across the entire group.

This process works exceptionally well because physical modelling instantly creates a safe distance from personal defensiveness. Simply put, exploring a neutral model is far easier than directly challenging a senior person. Ultimately, that comfortable distance frequently leads to much more honest discussion and far deeper reflection.

Why the Method Works in Leadership Settings

This method proves incredibly valuable in leadership settings. Specifically, it seamlessly combines deep reflection, clear communication, and powerful systems thinking into one unified process.

Leaders rarely deal with isolated, simple issues. Instead, they constantly manage heavily interdependent forces: culture, structure, daily performance, communication, team trust, shifting priorities, and intense external pressure. These are never separate topics. They are deeply connected.

LEGO® SERIOUS PLAY® actively helps leaders build those vital connections visibly. Therefore, instead of discussing one isolated issue at a time, teams can accurately model the wider system. Consequently, they clearly see feedback loops, discover hidden tensions, and uncover structural constraints. Ultimately, that visibility creates vastly superior strategic conversations. People finally explore not just what is happening, but precisely why it is happening.

What a Workshop on Leadership Assumptions Looks Like

A dedicated workshop strictly focused on leadership assumptions usually follows a highly clear, logical progression.

Click the ‘+’ button below to explore the workshop stages.

1. Individual Model Building & 2. Storytelling

1. Individual model building: First, each participant actively builds a personal model. This model vividly shows how they truly believe the organisation creates value, exactly what gets in the way, and precisely which conditions matter most. Consequently, this initial stage helps reliably reveal private assumptions that would usually stay unspoken.

2. Storytelling and explanation: Next, each person thoroughly explains their model. Meanwhile, the facilitator carefully listens for recurring themes, hidden contradictions, and unspoken beliefs. This stage remains critically important. Ultimately, the true meaning of the model comes entirely from the shared story, not just the plastic bricks.

3. Identifying Assumptions & 4. Shared Model Creation

3. Identifying assumptions: Then, the group begins actively naming the assumptions now visible in the models. For example, they might say: “We assume people understand the strategy,” or “We assume middle managers are the main bottleneck.” Once the group explicitly names these assumptions, they can properly examine them.

4. Shared model creation: Afterward, the group collaboratively builds a massive, shared model of the current strategic system. This powerful exercise helps leaders clearly see where their assumptions align perfectly, where they differ sharply, and exactly where the system may prove more fragile than expected.

5. Testing and Reframing

5. Testing and reframing: Finally, participants deeply explore which assumptions remain useful, which urgently need hard evidence, and which may currently limit strategic progress. Ultimately, this stage is precisely where the most valuable, game-changing insights emerge.

When This Is Especially Useful

Leadership assumption work proves especially useful when an organisation is actively experiencing:

In these high-stakes situations, surface-level discussion simply is not enough. Leaders desperately need a reliable way to critically examine the deeper logic shaping their decisions. Ultimately, that deep examination is exactly what this process supports.

What Leaders Gain From the Process

When leadership assumptions finally become fully visible, vastly better decisions become instantly possible. Consequently, leaders can:

• Quickly identify invisible barriers to true alignment.
• Drastically reduce costly misunderstandings at the senior level.
• Significantly improve overall strategic coherence.
• Clearly clarify exactly what needs hard evidence rather than mere opinion.
• Greatly strengthen communication across the entire organisation.
• Confidently build far more resilient plans under extreme uncertainty.

The biggest shift is often surprisingly simple: leaders finally stop treating assumptions as absolute facts. That fundamental shift matters immensely. It instantly creates vital room for deep inquiry, rapid adaptation, and far more intelligent collaboration.