How are acceptable stall characteristics achieved in aircraft design?

Stall characteristics must provide adequate warning and be recoverable. Requirements: Warning - Buffet, stick shaker, or natural aerodynamic cues 5-10% above stall; Controllability - No uncommanded roll/yaw, positive pitch control throughout; Recovery - Standard technique (reduce AOA, add power) effective. Design for good stall: Wing twist - Washout delays tip stall (maintains aileron effectiveness); Stall strips - Leading edge devices trigger root stall first; Planform - Moderate sweep and taper prevent tip stall; and Airfoil selection - Docile stall characteristics at root. Issues to avoid: Tip stall (roll-off, spin entry), Deep stall (T-tail), and Pitch-up. Analysis: CFD for stall progression, wind tunnel for validation. Testing: Flight test to full stall in multiple configurations. Certification: FAR 25.201-207 stall requirements. Stall protection systems (stick pusher) may be required for some configurations. High-AOA testing is among most critical flight test phases.