The POGO report describes how IDA had produced an independent study for the Pentagon, entitled "F-22 A Multiyear Procurement Business Case Analysis," that advised the U.S. Congress that a multiyear procurement (MYP) of the Lockheed Martin F-22 Raptor could result in a cost savings, which is one of six requirements for issuing a multiyear procurement contract. The report did note, however, that this estimated cost savings was less than for other historical MYPs. Congress then approved the MYP, through a legislative amendment, proposed by Senator Saxby Chambliss (GA), partly on the basis of the report's findings. The IDA report was the only one at the time that backed an F-22 program extension, in contrast with two other previous reports that had advised against it. A separate study by RAND, however, commissioned in the wake of the IDA-EDO scandal, also estimated a cost savings associated with an F-22 MYP contract, which was actually larger than the estimated cost savings that IDA reported. The Chambliss amendment extended the production life of the Lockheed Martin F-22 Raptor by three years, overturning a previous decision to phase out the fighter plane because of safety and performance problems, as well as its huge expense. In testimony before the Senate Armed Services Airland Subcommittee, on 25 July 2006, POGO's Danielle Brian said: