This study addresses the need for a legal framework that accommodates changes in working conditions arising from performance evaluations amid the spread of performance-oriented personnel management. Prior research and case law have often assessed justification from an undifferentiated, comprehensive perspective, without distinguishing among the operational stages of evaluation, thereby creating confusion about the proper object of review and, at times, conclusions misaligned with the purposes of labor law. Conversely, efforts to resolve the ambiguity of "personnel evaluation" by classifying employer measures and applying type-specific criteria for each type have increased interpretive complexity.
To reduce both ambiguity and complexity, this study clarifies the object of justification by dividing the evaluation process used in practice into stages and examining, for each stage, the criteria for judicial review and the standards of justification. In practice, evaluation proceeds through: establishing the evaluation system; implementing the evaluation and deriving results; and taking personnel measures based on those results. Reconstructed under the Labor Standards Act, the objects of review become: (a) the evaluation system itself; (b) the operation of the evaluation and its results; and (c) adverse measures taken on the basis of the results. Each area has distinct rules for reviewability and justification.
First, the evaluation system itself is, in principle, not subject to judicial review, except where special circumstances exist (e.g., violation of public policy and good morals). Second, while conducting the evaluation is a factual act without independent dispositive effect and the results are abstract grades or scores, courts must review whether the process or results were unfair when they are inseparable from subsequent adverse measures. In this sense, the results alone generally do not trigger Article 23(1) of the Labor Standards Act (Korea). Third, most legitimacy determinations focus on unilateral adverse measures by the employer based on the results. Where sanctions or measures are recognized, they are subject to judicial review and to assessment under Article 23(1). The scope of review encompasses acts and omissions of the employer (and, for directly linked measures, may include the results themselves). The criteria include just cause under Article 23(1) and the worker's standing to seek relief, and the burden of proving just cause rests with the employer.
This three-part framework enables a consistent assessment of the justification for diverse exercises of employer personnel authority based on evaluations, without resorting to intricate categorical proliferation. Given the paucity of legislative discussion on these issues, sustained doctrinal analysis remains both necessary and meaningful.