Choosing between two internal promotion candidates starts with the job you need someone to do. Write down its outcomes, compare both people against the same requirements, and mark what you have not observed. Then resolve the uncertainty that could change your choice. One person can be qualified and still not be selected for this opening.
What you'll learn
- Compare evidence for the destination role rather than reward current output alone.
- Separate a missing opportunity to demonstrate a skill from evidence of a weakness.
- Explain one selection, the remaining risk and the support you will provide.
Compare internal promotion candidates against the actual role
Confirm that the vacancy, scope and decision process are real. Follow any existing promotion policy and involve the person authorised to approve the appointment. Check privately that both employees want this particular role on its actual terms. Do not turn an unapproved possibility into a competition.
Consider a hypothetical 24-person company appointing a customer-operations lead. The lead will allocate a small team's work, resolve difficult handoffs and coach colleagues through recurring service problems. They will still handle some cases, but personal case volume is not the main purpose of the job.
Before comparing names, describe what good work would look like: urgent cases have an owner, handoffs reach the next team with enough information, and colleagues can handle more recurring problems without the lead taking over. State the decisions the lead can make and when they must escalate. Keep only requirements that the actual role needs.
If there is no approved opening, use the separate conversation about an employee who is ready for promotion when no role exists. This decision begins with one available job; it is not a way to invent a title to retain two people.
Put both candidates on the same evidence sheet
In the example, candidate A resolves difficult customer cases accurately and has helped new colleagues learn the system. Candidate B coordinated two cross-team handoffs during a launch, but their follow-through on routine case work has been less consistent. Both have useful evidence and questions to answer. Neither record alone settles who should lead the team.
- 01
Name the outcome
Use a requirement of this vacancy, such as allocating urgent work without losing routine cases. Avoid vague qualities such as 'leadership presence' unless you can say what work they describe.
- 02
Record comparable evidence
For each candidate, identify an actual situation, their action and the result you can verify. Ask both the same core questions and let each correct missing context. Separate their contribution from the team's result.
- 03
Mark unknowns and support
Write 'not yet observed' where evidence is absent. Record whether the person had a reasonable chance to demonstrate the skill. Name the training, authority or manager time each would need; do not quietly assume one will receive more help.
Use existing work records and relevant conversations rather than informal lobbying. A colleague's specific account of a handoff can be checked; 'everyone sees them as the natural leader' cannot do the same job. Do not collect private gossip or ask people to campaign for a favourite.
In that study, stronger sales performance was associated with promotion, yet prior sales performance negatively predicted the researchers' measure of managerial performance among those promoted. They estimated that measure through subordinates' sales, with controls. This is a reason to examine evidence for the destination role separately from current output.
It does not show that your strongest contributor would be a poor manager. The data are observational, come from a particular sales setting and do not establish that firms made irrational choices: rewarding current performance can serve other incentives. The decision sheet here is practical editorial guidance, not an assessment validated by that research.
Also keep the employee's own career preference in view. The individual contributor or manager decision belongs to them. A promotion process should not treat management as the only respectable way to progress.
Resolve the unknown that could change the choice
For the customer-operations role, suppose A has never had authority to allocate work across the team. That absence is not proof they cannot do it. B has done it, but you still need to understand how they would keep routine follow-through visible alongside urgent handoffs.
Give both a bounded scenario: two urgent customer cases arrive while a colleague is absent and another team is waiting for a handoff. Provide the same workload information and decision authority. Ask what they would allocate, what would move, whom they would inform and when they would check the result. Explain those criteria in advance and provide any necessary access or adjustments through the appropriate process.
The US Office of Personnel Management guidance on structured interviews uses predetermined common questions and common evaluation standards. Borrow that discipline here. It is US federal selection guidance, not evidence that this small-company exercise guarantees fairness or predicts who will succeed.
Suppose A's response resolves the hardest case personally but leaves the remaining workload unassigned. B names owners for both urgent and routine work, checks the handoff with the receiving team and sets a follow-up. Ask the same clarifying question about competing demands before drawing a conclusion. Evaluate the reasoning against the role, not who speaks more smoothly.
That response can add relevant evidence for B; it does not erase A's coaching record or B's earlier follow-through problem. In this hypothetical case, the manager selects B because coordinating work through others is the decisive need of the vacancy. The manager also names routine follow-through as a risk and commits to reviewing it. The exercise informs a judgement, rather than proving future performance.
Explain the selection without rewriting the other person
For the selected candidate, name the remit, authority, unresolved risk and support. In the example: 'This role needs someone to coordinate the whole queue and cross-team handoffs. Your launch work and the scenario gave me relevant evidence. We also need routine follow-through to improve. I will review that with you as you take on the role.' Confirm the terms through the normal process before announcing anything.
For the other candidate: 'I have selected someone else for this opening. Your case work and coaching are valued. The deciding requirement was allocating work across the team. In the scenario, some work was left without an owner, and I needed stronger evidence on that requirement for this appointment. That does not mean you cannot lead.' Hear their response and correct any material factual error through the agreed process. Do not disclose the other person's records or confidential feedback.
Where the employee has actually fallen short of an agreed requirement, the guide to an employee who is not ready for promotion can help with that different conversation. Do not apply that label merely because only one vacancy existed.
Take retention concerns and backfill seriously, but keep them visible as separate plans. 'I cannot afford to lose you from your current job' is not evidence that another person fits the vacancy better. Likewise, long service deserves recognition without quietly replacing the requirements you told both candidates you would use.
Check the support you promised after the appointment
For the hypothetical lead, review a few real allocations and handoffs. Are routine cases still assigned when an urgent issue arrives? Did the receiving team have what it needed? Did you provide the authority and coaching time you promised? If the role is not working, investigate the current work and support rather than defending your original choice or blaming the person from one incident.
Before closing the decision record, check that it names the vacancy, the deciding evidence, the uncertainty that remains and who will provide support. You should be able to use that explanation in both private conversations without changing the selection rule. Keep the note proportionate and accessible only to the people who need it under your normal records policy.
Cooperly's Coop Profile can help prepare conversations about working preferences and support. Use the person's own input alongside current work context. A profile does not rank the two candidates, certify readiness or decide a promotion; that judgement remains with the responsible people.