Human-Centered Design Fundamentals Design products that accommodate actual human cognition and behavior rather than expecting humans to adapt to arbitrary system requirements. When to Use ✅ Use for: - Physical product design (doors, appliances, controls, tools) - Digital interface design (software, touchscreens, dashboards) - System design where human error is critical (medical devices, industrial controls, aircraft) - Redesigning systems after repeated user errors - Creating instructions and documentation - Error prevention and safety-critical systems ❌ NOT for: - Pure visual design without…