How does illness affect work function?
A diagnosis label does not prove incapacity — the policy test is work-function impact. Your doctor should connect symptoms and treatment effects to concrete limits: attendance reliability, sustained concentration, decision quality under pressure, physical stamina, treatment side-effects, travel tolerance, supervision capacity, and error or safety risk.
Purpose
Map symptoms to duties, stamina, and reliability.
Evidence the workspace should capture
Functional-capacity / duty-impact matrix, treating-doctor letter addressing work limits, employer duty list.
Language map
Related terms — how this question connects to everyday, medical, functional, and policy language.