The World Health Organization includes burn-out in ICD-11 as an occupational phenomenon rather than a medical condition, and it defines it as a syndrome resulting from chronic workplace stress that has not been successfully managed. It lists three dimensions: energy depletion or exhaustion, increased mental distance or cynicism toward the job, and reduced professional efficacy (WHO).
That definition matters for a monthly check in two ways. First, it locates the cause in the work, so the fixes are mostly workload, control and clarity rather than a wellness poster. The US Centers for Disease Control and Prevention's training for supervisors makes the same point, describing burnout as an occupational strain state and reminding managers that research since the early studies has shown it occurs across many kinds of work, not only in helping professions (NIOSH module outline).
Second, it gives you three observable signals: people running out of energy, people pulling away, and people getting worse at things they used to do well. A manager is not diagnosing anything. A manager notices sustained change and adjusts what they control.
A caution worth repeating to your team: scholarly work questions how solid the burnout evidence base is and how cleanly the concept separates from depression. One review of the evidence argues for methodological caution about the construct (Bianchi and Schonfeld in the Bulletin of the World Health Organization), and clinical writing notes that burnout can overlap with depression, so a person may need both a work fix and clinical support (Cleveland Clinic). Mental Health America draws the practical line: burnout is usually tied to specific roles or responsibilities and can improve with rest or reduced demands, while depression affects all areas of life and does not go away with a break (MHA).
Decision rule: if the signs are limited to work and ease when the work eases, treat it as a work-design problem. If the person describes it as following them everywhere, across weekends and vacations, your job is to point to confidential professional support and stop treating the conversation as performance management.



