Safety Critical Work is a complex psychomotor performance depending on arousal, perception, learning, memory, attention, concentration, emotion, reflex speed, time estimation, auditory and visual function, decision-making and personality; train drivers must stay aware, perceive, interpret, anticipate and act on signals, sustain selective and divided attention and vigilance, memorise information, cope with emotional demands, low decision latitude and solitary work, and respond appropriately to emergencies. Psychiatric conditions encompass cognitive, emotional and behavioural disorders such as schizophrenia, depression, anxiety disorders and personality disorders, differing greatly in cause, symptoms, severity and whether episodic or persistent, and their impact varies with social circumstances, job and coping, so fitness assessment must be individualised on the specific pattern of illness, the potential impairments (Table 19) and severity rather than the diagnosis itself. Assessment uses history, tools such as the K10 questionnaire for anxiety and depression, consideration of medication effects, insight and adherence, and specialist psychiatric or psychological opinion where needed; it recognises that frontline rail work carries its own mental health risks, including exposure to suicides on the railway managed through critical incident programs, and that employee assistance referral may help. The fitness criteria in Table 20 set when a worker with a psychiatric condition is not Fit for Duty Unconditional and the conditions, including treatment, stability, insight and specialist review, under which Fit for Duty Subject to Review may apply for Category 1 and Category 2 work.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.