Air Traffic Control:

Voice Communications System Challenges Continue

IMTEC-91-49: Published: Aug 5, 1991. Publicly Released: Sep 6, 1991.

Additional Materials:


Office of Public Affairs
(202) 512-4800

Pursuant to a congressional request, GAO assessed the Federal Aviation Administration's (FAA) revised acquisition strategy for its Voice Switching and Control System (VSCS).

GAO found that: (1) after 5 years of development, VSCS contractors have been unable to successfully produce a prototype system that meets FAA requirements; (2) due to the problems in acquiring an acceptable prototype, the total estimated cost to design, develop, produce, and install VSCS tripled from $258 million to over $786 million between fiscal year (FY) 1982 and FY 1989; (3) contractors' difficulties have delayed VSCS implementation at the first operational site from FY 1986 to FY 1994; (4) the revised acquisition strategy's goal is to complete acceptance and controller operational testing at the contractors' facilities and to avoid delays in Advanced Automation System workstation implementation; (5) FAA exploration of alternative interim voice communications systems will impose additional initial costs on the government, but provide FAA with additional communications options; and (6) although FAA improved its VSCS acquisition strategy, some VSCS requirements remain difficult to attain.

Oct 3, 2018

Sep 13, 2018

Sep 5, 2018

Jul 30, 2018

Jul 26, 2018

Jul 19, 2018

Jul 12, 2018

May 31, 2018

May 29, 2018

May 24, 2018

Looking for more? Browse all our products here