In a similar vein, most people understand airplanes fly due to the lift provided by the wings, but far fewer could probably explain the exact physics behind flight. The average passenger who is traveling does not need to understand the principles involved in flight, but the pilots and the individuals who design aircraft must understand these concepts, or they will generate flaws in the design that will lead to tragedies like the one experienced by Admiral Shovell. Like many Continuous Quality Improvement (CQI) theories, Total Quality Management (TQM) offers its users a method to understand what is happening within an organization and ways to improve quality and efficiency.