Mariam Gordiashvili
HR Project Manager
March 20, 2026
We analyze the process of calibrating employee evaluations: how to align the results of the Performance Review, reduce subjectivity and build a transparent evaluation system.
Contents
The Performance Review period is often perceived by employees as a game of Mafia. Everyone loves each other and considers them best friends, but at night the questionnaire is filled out and the next morning… Someone gets a low grade. Mistrust grows, the background in the team becomes negative, which leads to conflicts and silence.
According to Gallup, only 14% of employees believe that their performance evaluations are completely objective.
Nobody wants to turn out to be a “mafia” and be thrown out of the team. This leads to the fact that the ratings of favorite colleagues are inflated, unloved ones are underestimated, and at the center of this is the HR team, which needs to clear out the unrealistic rubble of top performers.
It is calibration that allows you to turn Performance Review from a formality into a management tool: to align standards, identify real points of growth and reduce the risk of conflicts.
In this article we will look into:
- how to explain to employees the importance of sincerely filling out the questionnaire;
- how to free managers from the fear of giving a low rating to a team member;
- which algorithm will help calibrate ratings;
- and more.
What is assessment calibration, how is it done and why is it needed?
Appraisal calibration (or qualification) is the adjustment step of a Performance Review in which the company checks employee ratings for objectivity, comparability, and compliance with role expectations.
Simply put, this is a process that answers the main question: to what extent are the grades given reflect the real contribution of the employee, and not the subjective opinion of the participants in the evaluation.
In the classic evaluation cycle, calibration occurs immediately after feedback is collected. At this stage, managers and HR:
- compare scores between employees and teams;
- correlate results with grades and role expectations;
- detects imbalances (for example, when the entire team’s score is “above expectations”);
- adjust ratings if necessary.
Research by Deloittefound that companies that implemented score calibration experienced 30% fewer conflicts after a Performance Review.
Common errors when calibrating assessments
For all the simplicity of the mechanics, very often calibration leads to a worsening situation. We have analyzed the most common errors and their solutions.
1. Averaging ratings
In order not to offend anyone, the manager adds up all the scores, divides by the number of respondents and receives a final score. This approach:
- smoothes out important and significant differences;
- deprives the assessment of transparency and linkage to the employee’s real results;
- does not help an employee develop, understand his strengths and weaknesses.
Get rid of the desire to find a middle ground. If the estimates vary so much, you need to find the reason, rather than derive a “hospital average.” We recommend adding a block with a mandatory comment to the questionnaire, which will allow you to understand the reasons for the discrepancy. Calibration is not about a compromise, but about justifying the final assessment.
2. Protecting “your” employees
Managers often tend to overestimate their teams: out of loyalty, fear of demotivation and other factors.
Cross-functional calibration helps here, where assessments are discussed in a broader group: with HR, heads of related areas or a higher-level manager.
According to Gartner, 62% of managers admit that they adjust their ratings to avoid negative reactions from employees.
3. The rating is given in a vacuum
When position level is not taken into account in calibration, a bias occurs: employees are compared to each other rather than to role expectations.
Before calibration begins, you need to record with what exactly the employee is comparing. Not with a teammate, team lead, but with expectations from your role and grade.
Therefore, before calibration, it is useful to collect a short matrix of expectations by level: what is considered the norm, what is considered to be exceeding expectations, and what is considered a deficiency. Then the conversation becomes substantive, and the assessment itself becomes comparable between teams.
How to build a culture of honest feedback
If employees do not believe in the value of the assessment or are afraid of subsequent reprisals, then the company will not receive honest answers, and therefore important data for making management decisions. In this case, it’s worth running a PR campaign Performance Review.
Tie assessment to development, not consequences
Each employee must understand what will follow the assessment: not months of silence and sudden layoffs, but 1-1 meetings with the manager, discussing results, growth scenarios and developing an IPR.
Create a clear Performance Review timeline and announce it to all employees. It is very important to avoid information vacuum.
Make Performance Review part of your corporate processes
When feedback is given once a year, any assessment becomes critical and painful. Regular 1-1 meetings, short pulse surveys, creating a feedback loop and intermediate discussions reduce tension. The employee gets used to receiving feedback about his work, understands his position and prospects more clearly, and therefore stops worrying about the results of the Performance Review.
Change the wording in the questionnaires
The wording of a question greatly influences employee behavior. For example:
- “How effective is the employee?”
- “How will the dismissal of an employee affect the company’s results?”
- “What does the employee do well and what can be improved?”
Read these three formulations and answer for yourself which one causes the least rejection and inner feelings. The latter option is perceived softer and sets the focus on development rather than on personality assessment.
Use the same technique when preparing questionnaires. If you can’t evaluate it yourself, read the options to your colleagues or ask the AI a question.
Separate assessment and compensation by time (if possible)
When the results of a Performance Review directly affect salary, employees automatically stop answering truthfully and begin to adjust their answers and wording (back to the game of “Mafia” from the beginning of the article).
Therefore, if it is possible to separate these processes – at least partially – do it, the level of honesty of respondents will immediately increase.
“The task of HR is not to try to convince the team, but to build a system in which assessment really leads to growth. Then employees begin to perceive it as a tool, and not as a threat.”
Sergey Andreev, co-founder of the Appraise HR platform
How to help your manager
Even with a good methodology, everything depends on the leader. It is he who makes the final decision.
Help overcome impostor syndrome
Many managers are afraid to lower estimates because they are not confident in themselves, do not want to spoil relationships and are afraid of conflict.
It is important here to give the manager support in making decisions:
- Clear criteria: when it is clear what exactly counts as an outcome for each role, the fear of being “judged wrong” is reduced.
- Examples of wording: It is easier for a manager to give honest feedback if he has ready-made scripts for conversation.
- HR support as a moderator and partner to whom you can come with a questionable case and discuss a solution before the final assessment.
Teach how to speak with employees at 1-1 meetings
The issue of evaluation is extremely sensitive. Employees expect correct feedback that will allow them to take a healthy look at their career prospects.
That is why calibration should be completed not only by revising the scores, but also by preparing managers for 1-1 meetings. If after the conversation the employee still has an understanding of the development scenario and the next steps, even an unpleasant result will be perceived more calmly.
Help managers give feedback correctly. You can use the “sandwich” principle, which has long been familiar to everyone:
- what happened;
- where they did not live up to expectations;
- what you need to do to grow.
According to McKinsey, employees are 2.7 times more likely to perceive feedback positively when they see it as an opportunity for growth rather than a threat of punishment. And LinkedIn Learning research showedthat employees are 3.6 times more likely to accept feedback positively if it is accompanied by a specific development plan.
Checklist: are you ready to calibrate the assessment
There is no magic pill, but there is a set of conditions without which calibration will either not work or will give distorted results.
Go through the checklist:
What you need for success
How to check it
You have the described grades and role levels
Employees understand the differences between Junior, Middle, Senior, and what expectations are assigned to each level.
Evaluation criteria defined
It is clear what is considered a good result, what metrics and behavioral indicators are used, how to distinguish “meets expectations” from “exceeds expectations.”
Managers are involved in the process
Managers understand the goals of the assessment, are ready to discuss the results, and do not avoid difficult decisions.
There is a regular evaluation cycle
Calibration works only in the system: onboarding, regular assessments, 1-1 meetings, development of IPR.
HR acts as a moderator, not an observer
HR monitors compliance with standards, helps in complex cases and does not leave the team alone with the results.
And don’t forget about the most important thing:
You'll need a platform that makes assessment and calibration effortless
If data is collected manually, calibration quickly becomes chaos. Appraise helps automate Performance Review, conduct calibration in a controlled manner while saving historical data, collect analytics, track employee grades, and more. The whole cycle on one platform.
Conclusion
Evaluation calibration is an important step that must take place in all controversial cases.
It helps:
- remove subjectivity;
- align standards;
- reduce conflicts;
- restore trust to the process;
- make the assessment useful for making business-oriented decisions in team management.
If employees understand the logic of grading, managers are not afraid to give them, and HR supports the process – Performance Review ceases to be a “mafia game” and becomes a working development tool.
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