``No possible combination of known substances, known forms of machinery, and known forms of force, can be united in a practical machine by which man shall flay long distances through the air.''
Simon Newcomb (1835-1909), astronomer,
head of the U.S. Naval Observatory.
Through the exploration and analysis of many case studies, including the 3 aforementioned examples, many correlations between these cases were apparent; therefore, it was possible to extract eight major causes of failure;