Constraints
Technicians wear gloves and work under time pressure. Copy needs to be scannable, never decorative, and surface the consequence of every action before it happens.
Decisions
- Verb-first action labels (“Run sample” not “Sample run”)
- Two-line confirmation pattern: what will happen + what to do if wrong
- Inline irreversible-action warnings tied to the step, not a modal
Result
Procedure errors fell 58% in the first month of rollout across 6 labs.