The user who did not choose the software
Most of our interfaces are operated under pressure by someone who was assigned the job. That changes the brief. The ICCS quick-response interface is a PIN-gated tablet with compact alert cards and a read-only map, because a responder at a perimeter should not be able to mis-tap a dispatch. Alerts are graded at three levels and an alerting feed pins itself. Clinical capture is drawn for gloved, one-handed use. In each case the scarce resource is attention rather than screen area, and that is decided before anything is drawn.