The dominant model of leadership assessment rests on a single premise, and the premise is coherent. Leadership capability is a property of individuals: it can be identified, measured, compared across candidates, and - this is the decisive claim - carried from one situation to the next. The competency framework, the structured interview protocol, the psychometric battery, the normative database: each element of the selection architecture is designed around this premise. Remove it, and the architecture has no foundation. If what constitutes capable leadership shifts substantially depending on the conditions in which it is exercised, then the thing being measured is not what is being claimed.
The portability premise does not persist because the people who use it are naive about organizational context. Practitioners with decades of selection experience know that situations differ, that roles make different demands, that the leader right for one organization is not automatically right for another. The premise persists because the alternative is unworkable. If leadership effectiveness is determined by the specific interaction between an individual and a particular organizational situation - if what capable leadership requires changes substantially across ownership structures, business cycles, governance arrangements, and organizational health states - then the selection process faces a problem it cannot solve with the tools it has. How do you compare candidates if there is no stable property to compare? How do you make a defensible recommendation if the criteria shift with the context? How do you build a development pathway if the capability being developed only exists in specific situational conditions?
The portability premise is a solution to these problems. It is the assumption that makes the whole process work. That is a legitimate function, and it is worth understanding clearly before examining where the assumption fails.
The dominant model dominates for reasons that are worth understanding precisely. It solves real problems, and it solves them in ways that matter to the organizations that use it.
It creates comparability. The candidate who interviews brilliantly and leaves the panel with a strong impression is not the same thing as the candidate who demonstrates the highest capability against a structured framework. Selection panels without structured criteria tend to reproduce the characteristics of whoever already occupies the role: they respond to familiarity, to similarity, to the social signals that correlate with previous incumbents. Structured criteria, applied consistently across a shortlist, interrupt this. They create a common language for evaluation, one that is visible enough to be contested and revised. They also create interoperability across the selection process: the board, the search firm, and the HR function can discuss candidates against a shared framework rather than reconciling incommensurable impressions. In a process involving multiple stakeholders with different vantage points on the organization, that shared framework has practical value that should not be underestimated.
It produces decisions that can be examined. When a leadership appointment is made against explicit criteria, there is a record of what was assessed, how the assessment was conducted, and why the decision went the way it did. That record does not prevent failure. What it does is enable learning: the organization can return to it, examine what the assessment showed, and ask whether the framework captured what turned out to matter. Organizations that make selection decisions on impression and intuition have no such mechanism. When the appointment fails - and a proportion always do - they are left with a post-mortem that produces the same vocabulary every time: culture fit, execution gap, wasn't quite right. The vocabulary describes the failure without illuminating it, and the organization makes the next appointment in the same way as the last.
It generates a logic of development. If leadership capability is an individual property, it can be built. The same frameworks that guide selection inform how leaders are assessed for development, what assignments build which capabilities, where the gaps are and how to close them. This logic underpins executive coaching, leadership development programs, high-potential pipelines, and succession planning processes across virtually every large organization. The logic is not wrong. Individual capabilities do develop. A leader at forty has access to capabilities - judgment, pattern recognition, composure under pressure - that were not available to the same person at thirty. The portability premise makes a coherent development theory possible, one that connects selection criteria to development investments to succession outcomes in a single continuous logic. Without it, development becomes a loosely connected set of interventions with no clear relationship to what the organization is trying to build.
These contributions are real. The case against the dominant model is not that it is worthless, or that its tools are poorly designed, or that the professionals who use it are making avoidable errors. The case is more precise than that, and it starts not with the tools but with the question the tools are designed to answer.
The crack appears where the model is asked to explain something it structurally cannot: why highly assessed, rigorously selected leaders fail in specific situations. Not occasionally, not as isolated exceptions, but in recognizable patterns that repeat across organizations facing structurally similar conditions.
The leader who performs with distinction in one context and produces poor outcomes in the next is not a curiosity. It is common enough that every experienced selection professional has encountered it, and common enough that the organizations it affects have developed a stable vocabulary for describing it after the fact. The pattern is not random failure distributed evenly across the population of leaders. It clusters. It concentrates at specific inflection points, in specific ownership contexts, at specific moments in an organization's development. The PE-backed company that stalls not because the strategy is wrong but because the leader who negotiated the deal is not the leader the operating phase requires. The family business that navigates succession with apparent competence and encounters catastrophic failure eighteen months in, when the relational architecture the departing generation held together begins to fracture. The listed company that appoints an executive whose credentials are impeccable and discovers, late, that those credentials measured the right capability for the wrong version of the challenge. The founder-led business that brings in a professional leader to scale the operation and watches the organization's energy dissipate in the gap between the new leader's formal authority and the informal loyalty structures the founder built. Same pattern. Different manifestation. Each time, the assessment was rigorous. Each time, the process worked as designed.
The model's account of this is the vocabulary of the post-mortem. Culture fit. Execution gap. Wasn't quite right. These phrases appear with enough regularity across organizations, sectors, and geographies that they cannot be describing individual failures. They are describing a category of failure. The description is accurate as far as it goes. What it cannot do is predict the failure from the assessment data that preceded it, or tell the organization what it should have looked for that it did not.
This is not a failure of execution. The gap between what was assessed and what turned out to matter is not closed by applying the existing model more rigorously. Organizations that invest in more structured interviews, more sophisticated frameworks, more comprehensive assessment processes still produce the pattern. The explanatory gap belongs to the logic of the model, not to the quality of its application. What the model cannot explain, it cannot prevent.
The architects of trait-based assessment have not ignored context. The more developed frameworks acknowledge that situations make different demands, that leadership effectiveness varies across roles and organizations, that adaptability - the capacity to adjust to different conditions - is itself a capability worth assessing. Context appears in the literature and in the frameworks. It is accounted for.
The frameworks that account for context do so in a specific way. They treat it as an adjusting factor, not a defining one. The core question stays fixed: how capable is this person? Context is then treated as something that shapes how that capability is exercised in practice - what it emphasizes, where it faces resistance, which strengths it calls on most. The capability stays constant. Context adjusts how it plays out. A leader with strong strategic capability exercises it differently in a PE-backed company than in a family business. The assumption is that the capability is the same; the situation shapes its expression.
The alternative is a harder claim. Context does not adjust how a fixed capability is expressed. Context defines what capable leadership actually needs to be in this specific situation. Those are not the same thing, and the difference between them is where the model's logic runs out. If the ownership structure, the business cycle position, the governance arrangements, and the specific inflection point the incoming leader will face in the first eighteen months define what the role actually requires, then an assessment that measures individual capability in abstraction from those conditions is asking the wrong question before the first candidate is evaluated. The tools are well-designed. The measurement is often precise. What is being measured is the wrong thing for the decision being made.
This is the category error: a failure of the question the whole process is organized around, not of the rigor with which that question is answered.
This is the category error: a failure of the question the whole process is organized around, not of the rigor with which that question is answered.
What determines leadership effectiveness in a specific situation, if individual capability measured in the abstract is not sufficient? The answer requires examining what the evidence on person-environment fit actually shows - and why its implications have been so consistently underweighted in how organizations make their most consequential leadership decisions.