The panel's report, known as the Kraft report, was published in February 1995. It recommended that NASA's Space Shuttle operations should be outsourced to a single private contractor, and that "NASA should consider ... progression towards the privatization of the space shuttle."[63] It also criticized the effect of safety changes made by NASA after the Challenger accident, saying that they had "created a safety environment that is duplicative and expensive."[64] Fundamental to the report was the idea that the Space Shuttle had become "a mature and reliable system ... about as safe as today's technology will provide."[65]