Critical flaws and incomplete testing have resulted in massive delays for the Pentagon's end-to-end online travel booking system, according to a new report from congressional auditors.

The eight-year effort to implement the $474 million Defense Travel System has come under intense scrutiny from lawmakers and government watchdog groups.

The Government Accountability Office report provides new fodder for opponents of DTS, which came close to being eliminated in a legislative effort headed by Sen. Tom Coburn, R-Okla. It survived a 65-32 Senate vote that if successful would have forced the Defense Department to use one of the General Services Administration's eTravel Service providers.

"DTS development and implementation have been problematic, especially in the area of testing key functionality to ensure that the system will perform as intended," the 59-page GAO report stated. "Consequently, critical flaws have been identified that resulted in significant schedule slippages between the planned and actual system deployment."

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