“Mario has been here for eighteen years. When the fleet manager role opened up, it was obvious who’d take it. He knows everything, he knows everyone, he’s a safe bet.”
That’s a sentence I’ve heard dozens of times talking with owners of transport SMBs. It sounds reasonable, it’s socially accepted, it rewards company loyalty. And it is, statistically, one of the worst choices a company can make.
The most recent research on internal promotion shows that seniority as a criterion produces managers on average less effective than random selection. That’s not journalistic hyperbole: it’s the result of rigorous simulations comparing four promotion strategies (pure merit, pure seniority, hybrid 70% merit + 30% seniority, random) across thousands of simulated scenarios.
Seniority lost almost every comparison.
Why seniority is a poor criterion (and why it’s used anyway)
The issue isn’t ethical. Rewarding those who’ve stayed is culturally sensible: it acknowledges loyalty, signals stability, motivates veterans. The issue is that seniority doesn’t measure what you need to be a manager.
A driver who’s been with the company for fifteen years has likely accumulated:
- deep knowledge of operational processes
- consolidated relationships with long-standing customers
- familiarity with vehicles and routes
- a network of internal relationships
All useful things. None of which predicts the ability to:
- handle a conflict between two drivers
- read an anomaly report and decide where to act
- communicate a planning change to a 12-person team without triggering panic
- assess a subordinate’s performance and give constructive feedback
- plan shift rotations factoring in regulatory constraints, personal needs, and fleet KPIs
These are different skills, in many cases orthogonal. Seniority as a predictor of these skills has the same informational value as a coin flip — and in some studies worse, because it’s correlated with cognitive bias (the “status quo bias” of someone used to doing things a certain way for fifteen years).
Yet transport SMBs keep promoting by seniority. Three main reasons.
It reduces perceived internal conflict. Promote the new hire over the veteran, and a case explodes. Promote the veteran, and “no one can say anything.” True — in the short term. In the medium term, it’s the team’s results that speak, and they speak differently.
It simplifies the decision. Choosing the right candidate based on competencies requires time, assessment, evidence. Choosing by seniority takes thirty seconds looking at the hire date. The hidden cost of “simplification” is very high, but it’s deferred and therefore invisible at decision time.
It reflects a culture that rewards loyalty as such. In many family-owned firms, the idea that long-tenured staff “deserve” advancement is deeply rooted and unchallenged. It’s a social norm, not a strategic choice.
What works better: three testable alternative criteria
Replacing seniority with something better doesn’t require organizational upheaval. It requires a shift in perspective on what we’re really looking for when we promote. Three concrete criteria that work and that any transport SMB can apply starting with the next promotion.
Criterion 1 — Problem-solving track record in non-standard situations
Don’t look at how a candidate performs when everything runs smoothly. Look at how they handled the last three or four anomalous situations: a key customer raising a serious complaint, an operational disruption (vehicle breakdown, driver absent, unexpected access restriction), a last-minute emergency.
People who handled these episodes well — not just resolved them, but managed them by communicating clearly, involving the right people, documenting for the future — have shown precisely the skills needed in a coordination role. Those who handled them poorly, even if they resolved them, usually did so heroically and unrepeatably, which is the classic pattern of the strong individual contributor.
How to apply it: over the next two months, track 3-5 anomalous episodes and note who handled them, how, and with what short- and medium-term results. When a promotion decision comes up, you’ll have concrete data on behavior, not opinions on character.
Criterion 2 — Demonstrated ability to read and use data
A good supervisor or fleet manager has to be comfortable with the essential fleet KPIs and use them to make decisions. It’s a skill that shows up quickly: some drivers, when they see their fuel consumption figure, ask to compare it with the shift average and reason about what might have affected it. Others, faced with the same number, say “don’t look at my numbers, look at my results.”
The first are promising candidates for coordination roles. The second, even if they’re excellent drivers, will struggle to read the data of the team they’d be managing.
How to apply it: during periodic meetings with drivers (even quarterly), share personal and team data and watch reactions. Notice who’s curious, who asks questions, who proposes concrete actions. These are behaviors visible in 20 minutes that predict future managerial success much better than seniority.
Criterion 3 — Demonstrated behavior in informal mentoring situations
In every fleet there are drivers whom junior colleagues spontaneously ask for advice. They’re informal “reference points,” chosen by the internal social network without any formal management decision. It’s a powerful and free leadership signal: it means they have authority recognized from below, communication skills, and willingness to explain rather than just do.
The opposite is the competent but reserved veteran whom no one asks for advice because “they just do their job.” Even if they’re excellent at it, they lack the social component needed for the coordination role.
How to apply it: ask, anonymously and periodically, younger drivers “who do you go to when you have an operational doubt?” The answers often surprise and reveal informal leaders not visible on the formal org chart.
The hidden cost of seniority-based promotion
It’s worth running the economics on a wrong promotion, even just roughly. In a transport SMB with a poorly promoted fleet manager:
- Direct cost of the bad managerial hire: industry data points to averages above €15,000 per position (selection, training, lost time, possible replacement).
- Cost of driver turnover from resignations: each driver lost in the new manager’s first 12 months costs between €8,000 and €12,000 in recruitment, training, and reduced productivity of the replacement. In a 12-driver fleet, even just two avoidable resignations are worth between €16,000 and €24,000.
- Cost of reduced efficiency: a poorly managed team running 10-15% below potential for 6 months, on a medium-sized fleet’s annual operating budget, easily costs between €20,000 and €40,000.
Total: between €50,000 and €80,000 for a single wrong promotion, in a medium-sized SMB. Most of these costs are invisible and show up in operating accounts without anyone tracing them back to the promotion decision of six months earlier.
The hard conversation to have with yourself
The real obstacle to change isn’t technical. It’s cultural and psychological.
Promoting by seniority is easy because it avoids difficult conversations. The conversation “Mario, you’re an extraordinary driver and you’ve been here for eighteen years, but the fleet manager role requires different skills and I think Luca is a better fit” is one that many SMB owners avoid. It costs emotional effort, can create tension, can lead Mario to resign.
Yet that’s exactly the conversation that separates growing companies from stuck ones. Companies with the courage to look at the role and not the candidate’s CV, to assess skills and not years of service, to talk openly about what’s needed in that specific role, build stronger teams.
The others keep promoting Mario, then wonder why two drivers quit last month.
The concrete first step
If a promotion is coming up in the next three months at your company, try an experiment. Write down on a piece of paper:
- Who you’d promote if you decided today, on gut feel.
- The three key skills the role requires (not the ones you’d expect in the abstract — the ones that matter in your context, with your drivers, with your customers).
- For each of the three skills, write a recent example where the candidate demonstrated it. If you can’t think of any example, that’s a data point.
Compare the final list with your gut choice. Often they don’t match. When they don’t, trust the process, not the instinct. And if you want to understand why instinct gets it so wrong on this decision, the empirical Peter Principle data tells a story worth knowing.
In many cases, the right person to promote is already in the company. They’re just not who you’d expect — and almost never the person with the most years of service.