Keep sentences compact, active, and scannable. Start steps with verbs like Check, Set, Confirm, or Escalate. Use consistent units, unambiguous numbers, and exact tool names. Bold hazards, italicize notes, and keep friendly tone without fluff. Avoid passive constructions that hide responsibility. A good test: can a new teammate, glancing between device and task, complete it correctly without pausing to reread or guess?
Select a small, consistent icon set with clear metaphors and enough contrast to work outdoors. Pair every icon with a short label to support color-blind colleagues. Use tightly cropped photos that show hands, positions, and reference landmarks. Add captions stating exactly what is correct or incorrect. Visuals should reduce uncertainty, not decorate space. If a picture raises a question, replace it or annotate it immediately.
Design for varied lighting, screen sizes, and users with differing abilities. Use high-contrast palettes, large hit areas, and a minimum 16–18px base font. Provide alt text, legible captions, and transcripts for clips. Avoid red-green reliance. Ensure screen reader order matches the intended step sequence. Accessible cards improve performance for everyone, particularly during early mornings, late nights, and noisy, glove-on situations.