The conventional narrative is that strategies fail in execution. That's a convenient story – it absolves the strategists and blames the operators. The truth is less comfortable: most strategies are dead on arrival because the assumptions underneath them were never examined with any rigour.
Walk into any boardroom where a strategy is being presented and you'll find the same architecture. Market sizing built on analyst reports that recycle each other's estimates. Competitive positioning based on what management believes rather than what customers confirm. Growth projections that extrapolate from the best quarter of the best year. None of this is strategy. It's aspiration dressed in spreadsheets.
The Assumption Problem
Every strategy rests on a stack of assumptions – about the market, the customer, the competitive response, the organisation's own capability. The quality of the strategy cannot exceed the quality of those assumptions. Yet in practice, assumption-testing is treated as a formality, something that happens in a risk appendix rather than at the core of the strategic process. The result is a plan that feels robust because it is internally consistent, while being fundamentally disconnected from external reality.
We see this pattern repeatedly in private equity portfolio companies. A management team presents a value creation plan with a compelling narrative and detailed financial projections. The plan passes every internal logic test. But the underlying assumptions – that the addressable market is growing at 8%, that pricing power will hold through expansion, that key accounts will tolerate a platform migration – have never been independently validated. When they turn out to be wrong, the response is always the same: the strategy was right, execution was the problem.
Diagnosis Before Prescription
In medicine, no competent physician prescribes before diagnosing. In business strategy, prescription without diagnosis is standard practice. Companies hire advisors to build a growth strategy without first understanding why current performance is what it is. They launch transformation programmes without identifying which constraints are structural and which are operational. They pursue M&A without establishing whether organic growth has been properly exhausted.
SENSUM's approach begins with a strategic diagnostic – a structured, evidence-based examination of the business as it actually operates, not as it presents itself. We stress-test the business model the way a sophisticated buyer would: scrutinising revenue quality, customer concentration, margin sustainability, and competitive defensibility. We do this not because we are preparing for a transaction, but because these are the questions that reveal whether a strategy has any foundation.
The Investor's Filter
What distinguishes our diagnostic from a traditional strategy review is perspective. We evaluate businesses as both advisors and investors. When we assess a strategic plan, we apply a simple but unforgiving filter: would we invest our own capital behind these assumptions? That question eliminates a remarkable amount of comfortable thinking. It forces honesty about market position, management capability, and the gap between ambition and evidence.
This is not about pessimism. It is about discipline. The best strategies we have seen – the ones that survive contact with markets, competitors, and time – are built on assumptions that have been attacked before they were adopted. They account for what could go wrong, not because the strategists lacked confidence, but because they understood that confidence without evidence is just optimism.
From Diagnosis to Action
A diagnostic without action is an academic exercise. The purpose of rigorous assumption-testing is not to produce a more sophisticated document – it is to produce a strategy that can actually be executed. When the assumptions are sound, the execution plan becomes clearer, the resource allocation becomes more precise, and the milestones become meaningful rather than aspirational.
We stay through implementation because that is where the diagnostic proves its value. The assumptions we validated – or corrected – in the first weeks become the guardrails for execution over the following quarters. When the market shifts, and it always does, the organisation has a framework for adapting that is rooted in understanding rather than reaction.
Most strategies fail before they start. Not because the people are wrong, but because the questions were never asked. The gap between planning and execution is not a gap of capability – it is a gap of honesty. Closing it requires the willingness to diagnose before you prescribe, and the discipline to treat assumptions as hypotheses rather than facts.