Define the aircraft requirements
Design the airframe
Design the wings
Design the fuselage
Design the tail assembly
Design the landing gear
Design the control surfaces
Select the engine or engines
Design the fuel system
Design the electrical system
Design the avionics system
Design the hydraulic system
Create detailed engineering drawings
Build prototypes
Test structural components
Test aerodynamic performance
Test propulsion systems
Test control systems
Test landing gear systems
Assemble the airframe
Install the engine or engines
Install wiring and avionics
Install fuel and hydraulic systems
Install interior components
Perform ground tests
Perform taxi tests
Conduct flight tests
Inspect and certify the aircraft
Complete final production assembly