A leadership appointment shapes more than one career. It changes how other people perform, grow, and decide whether to stay. It affects how strategy is translated into priorities, whose judgment carries weight, and what behaviors the organization is willing to accept from the people it puts in positions of power.
When a leader delivers results but consistently has a negative impact on their team, keeping that person in place is also a leadership decision. It tells the organization which outcomes matter most, which behaviors can be excused, and what leadership really means in practice.
When an organization appoints, promotes, or names a successor, it changes more than a box on the organization chart. It changes who sets priorities, which voices are heard, how decisions get made, and organizational culture.
One of the biggest leadership mistakes organizations make is promoting a high-performing individual contributor into a leadership role without first determining whether they can lead others. They may continue to deliver results, but at what cost to the team, the culture, and the talent around them? This is where the leadership pipeline can become flawed from the very beginning.
In many ways, the decision about who enters leadership may be one of the most important leadership decisions an organization makes, because it determines who moves into the pipeline and ultimately shapes the leaders the organization will have in the future.
That is why the real goal of leadership assessment is not a more sophisticated report. It is a better decision, with a clearer understanding of what that decision could set in motion.
In the previous article, we argued that more data does not automatically produce better insight. Evidence becomes useful when it is integrated around a specific decision. The next question is what makes a leadership decision so consequential.
The answer lies in reach. Get a leadership decision wrong, and the damage travels far beyond one promotion: Gallup finds that managers account for around 70% of the variance in team engagement, which means putting the wrong person into leadership can weaken a team today while feeding the wrong talent into your leadership pipeline for tomorrow {1}.
What one appointment sets in motion
Take a mid-sized company appointing a new director for a fast-growing team. The person needs to deliver today’s targets while building for tomorrow.
Leadership effectiveness is often discussed as though it resides entirely within the individual: their strengths, gaps, experience, and potential. Those qualities matter. But leadership is expressed through other people.
A leader determines what receives attention and what remains unsaid. They influence whether challenge is welcomed or treated as resistance, whether decisions are clarified or repeatedly reopened, and whether capable people are stretched, overlooked, or exhausted.
Research supports that wider view. A meta-analysis of 89 independent samples found that both task-focused and people-focused leadership behaviors were positively associated with team performance, including objective measures.[2}] The leader is not the only factor shaping results, but leadership is one of the most consequential variables an organization chooses.
The question is therefore larger than “Can this person do the job?” It is
What is likely to happen around this person when they do it?
Three ways this decision can go wrong
Organizations often think about leadership risk as a single failure mode: appointing the wrong person. That is only one way the decision can fail. A useful assessment strategy should help decision-makers see three.
The wrong yes. Someone is judged ready but cannot meet the role’s actual demands. In our director example, a strong individual contributor gets promoted because their delivery track record is excellent. The organization mistakes success in one role for readiness for a very different one. The wider costs show up later: decisions slow, the team compensates for gaps, and strategic work loses momentum.
The missed yes. Someone with genuine potential gets passed over because they do not resemble the organization’s existing picture of leadership. A quieter team member may consistently improve how the team works together, but their contribution is less visible than the loudest performer’s. Repeated missed yeses narrow the leadership pipeline and teach employees which qualities the organization actually rewards. Capable people either stop putting themselves forward or decide their future lies elsewhere.
The unfinished yes. The organization picks a credible leader, then treats the appointment as the finish line rather than the start. Say the assessment evidence showed that the new director thrives with clear autonomy but tends to withdraw under sustained pressure. If nobody builds that insight into onboarding or support, the organization has used the evidence to make a choice but not to improve the odds of success. Sometimes the person was right, but the mandate was unclear, support never arrived, or a known risk went unaddressed.
The cost shows up later, and somewhere else
Leadership decisions cast a long shadow. The real cost often appears later, far from where the decision was made.
Some show up in execution: priorities multiply, accountability blurs, and decisions slow as people learn to work around the leader. Others surface months later in the talent system: strong performers disengage, potential successors get too little exposure, or a team becomes dependent on one person’s constant intervention.
The scale of a manager’s influence is difficult to dismiss. Gallup has estimated that managers account for at least 70% of the variance in employee engagement across business units.[3] Its 2026 State of the Global Workplace data show global employee engagement fell to 20% in 2025, while manager engagement dropped from 31% in 2022 to 22% in 2025.[4] They do not mean every engagement problem is a manager problem. They show why everyday leadership matters so much to the environment people experience.
The downside becomes even clearer when leadership itself is damaging. A 2024 meta-analysis covering 104 longitudinal studies and 30,314 employees found that destructive leadership had lasting negative effects on employee attitudes and behavior, including job satisfaction, commitment, citizenship behavior, avoidance and counterproductive behavior.[5]
This is where the decision to keep a damaging leader in place becomes especially consequential. Organizations teach through what they tolerate as much as through what they say. A meta-analysis spanning 301 independent samples and 103,354 people found ethical culture was a key pathway connecting ethical leadership with employee behavior, and the strongest pathway examined for counterproductive behavior.[6] People watch what leaders model. They also watch what the organization permits.
Confidence also has a slower cost. Employees notice who gets promoted and what happens next. When appointments seem disconnected from the qualities the organization claims to value, trust in the talent process erodes. When a decision goes wrong but the reasoning behind it was never made explicit, the organization learns little from the outcome.
This matters even more when leadership pipelines are thin. DDI’s Global Leadership Forecast 2025, drawing on 10,796 leaders and 2,185 HR professionals across more than 50 countries, found that only 20% of companies reported having a strong leadership bench. High-potential talent was also 3.7 times more likely to intend to leave within a year when their manager did not regularly provide growth and development opportunities.[7]
Put together, this connects two problems organizations often manage separately: whether they have the leaders ready for tomorrow’s critical roles, and whether today’s leadership experience is quietly pushing future talent toward the door.
Today’s appointment shapes tomorrow’s bench.
Better evidence should change the decision and what follows it
Assessment adds value when it improves the reasoning around a consequential choice. That requires more than identifying a strong candidate.
Decision-makers need to understand the role and context first: what must be delivered, what is changing, which relationships will determine success, and where the greatest leadership risks sit. They then need evidence that examines not only current capability, but the foundations beneath it: the person’s traits, motivation, capacity to adapt, and the patterns that may emerge under pressure.
That evidence should lead to a decision that is both clearer and more actionable. For example:
- What supports the case for this appointment?
- What evidence challenges it?
- Which risks are inherent to the role, and which are specific to the candidate?
- What remains uncertain and needs to be tested?
- What conditions, support or development would make success more likely?
The result is not certainty. No assessment can remove the risk from a decision about future performance. The result should be a more transparent judgment, one that distinguishes evidence from inference and makes the assumptions behind the decision visible.
It should also create continuity after the appointment. The same insight used in selection or succession can shape onboarding, development priorities, stakeholder support and the early indicators to monitor. Assessment then becomes part of the decision process, rather than a report consulted before it and forgotten afterward.
The goal is better leadership decisions
At Human Edge, CORE™ Leadership is designed to support this broader view. It brings together traits, motivational drivers, capabilities, Human Performance, and potential derailers in one integrated Leadership Power Model.[8] Rather than presenting disconnected scores, it aims to help decision-makers see how different dimensions interact and what those patterns may mean in a particular leadership context.
Its purpose is not to produce a definitive verdict on a person. As a self-report assessment, its findings should be considered alongside role demands, structured interviews, observed behavior, and the experience of others. Its value lies in helping decision-makers build a more coherent hypothesis: how a leader is likely to create value, what may limit that contribution, and what will need attention for them to succeed.
That changes the conversation from “Who scored highest?” to “What does the evidence suggest about this person’s ability to create value here, what risks need to be managed, and what conditions will help them succeed?”
Better assessment methodology matters. It creates more dependable evidence. But methodology is the means, not the outcome.
The real measure is what changes because the organization understood the evidence better: the appointment it makes, the person it does not overlook, the risk it addresses early, and the conditions it creates for a leader and their people to succeed.
Every leadership appointment is also a cultural decision.
It tells people who gets trusted with power, what the organization rewards, and what it is prepared to tolerate.
A leadership decision is never only about the person appointed. It is a decision about the performance, confidence and future capability of everyone their leadership will touch.
Research sources
[1] Gallup. (2026). Employee engagement. Gallup. Gallup
[2} Ceri-Booms, M., Curşeu, P. L., & Oerlemans, L. A. G. (2017). Task and person-focused leadership behaviors and team performance: A meta-analysis. Human Resource Management Review, 27(1), 178–192. DOI
[3] Beck, R., & Harter, J. (2015). Managers Account for 70% of Variance in Employee Engagement. Gallup. Source
[4] Gallup. (2026). State of the Global Workplace 2026. Global data summary. Source
[5] Li, P., Yin, K., Shi, J., Damen, T. G. E., et al. (2024). Are Bad Leaders Indeed Bad for Employees? A Meta-Analysis of Longitudinal Studies Between Destructive Leadership and Employee Outcomes. Journal of Business Ethics, 191, 399–413. DOI
[6] Peng, A. C., & Kim, D. (2020). A meta-analytic test of the differential pathways linking ethical leadership to normative conduct. Journal of Organizational Behavior, 41(4), 348–368. DOI
[7] Development Dimensions International. (2025). Global Leadership Forecast 2025. Source
[8] Human Edge. (2026). CORE™ Leadership. Source
