Analysis of information sources in references of the Wikipedia article "Space Shuttle Solid Rocket Booster" in English language version.
GAO noted that: (1) the need for the advanced motor has diminished since the development program was first approved in 1988; (2) NASA had no actual flight experience with the advanced motors when the program was approved; (3) the advanced motor might not be used for launching the payloads originally identified; (4) NASA has launched the shuttle with no [further] evidence of any significant solid rocket motor safety problems; (5) development costs have increased $575 million due to reductions in the program's annual funding levels; and (6) NASA estimates that it would cost $212 million to terminate existing contracts as of September 30, 1993. - Actual report says 'the estimated development costs had increased by about 95 percent--to $3.25 billion from the program's January 1988 initial estimate and that the first flight schedule had slipped by over 2-l/2 years.'
