Most airplanes are constructed by companies with the objective of producing them in quantity for customers. The design and planning process, including safety tests, can last up to four years for small turboprops or longer for larger planes.
When the design has passed through these processes, the company constructs a limited number of prototypes for testing on the ground. Representatives from an aviation governing agency often make a first flight. The flight tests continue until the aircraft has fulfilled all the requirements. Then, the governing public agency of aviation of the country authorizes the company to begin production.
Headquartered in Chicago, The Boeing Company is the biggest combined manufacturer of commercial jets and military aircraft. Its business segments include Defence, Space & Security; Commercial Airplanes; Boeing Capital; and Shared Services Group.
Tower: "Delta 351, you have traffic at 10 o'clock, 6 miles."
Delta 351: "Give us another hint! We have digital watches."