How are anthropometric percentiles used in vehicle occupant accommodation?

Anthropometric percentiles describe human body dimension distributions used to ensure vehicles accommodate diverse populations. Typically, design targets 5th percentile female to 95th percentile male for critical dimensions (covering ~90% of adult population). Key applications include seat travel range, steering wheel adjustment, headroom, legroom, reach to controls, and sightlines. Different markets may require different reference populations. Package engineers use SAE J826 manikins and digital human models to verify accommodation. Trade-offs balance accommodation breadth against vehicle size and design constraints.