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GAO-05-659R 1 (2005-09-14)

handle is hein.gao/gaocrptartr0001 and id is 1 raw text is: SGAO Accountability * Integrity Reliability United States Government Accountability Office Washington, DC 20548 September 14, 2005 The Honorable Donald H. Rumsfeld Secretary of Defense Subject: Defense Transportation: Opportunities Exist to Enhance the Credibility of the Current and Future Mobility Capabilities Studies Dear Mr. Secretary: We are reviewing the processes the Department of Defense (DOD) is using to conduct its Mobility Capabilities Study (MCS). The MCS is to address changes in DOD's transportation force structure and mobility requirements due to changes in threats and certain national security and military strategies. The study results may underpin decisions on future strategic airlift, aerial refueling aircraft, and sealift procurements. The study relies on the use of various models and data inputs to develop and evaluate transportation alternatives, including variations in alternative transportation modes (air, land, sea) and sources (military, civilian, foreign), as well as factors that affect transportation mode and source decisions. The Senate Armed Services Committee directed us to monitor the conduct of the MCS and report on the adequacy and completeness of the report no later than 30 days after DOD completes the study.' As you may be aware, DOD plans to issue the MCS report during 2005. This letter is intended to bring to your attention preliminary observations on certain aspects of the MCS methodology to permit you to ensure the credibility of this and future studies. In our letter, we address the adequacy of the department's verification, validation, and accreditation (VV&A) of the models and simulations being used to conduct the MCS-that is, the process the MCS team2 is using to identify the models' capabilities, limitations, and performance relative to the real world events they simulate. We will continue to monitor the MCS and will report on the adequacy and completeness of the methodology after DOD issues its report. To do our work, we reviewed applicable DOD guidance, directives, instructions, and memos that describe how DOD would conduct its mobility capabilities ' S. Rep. No. 108-260, at 126 (2004). 2 The MCS study team includes officials from the Office of the Secretary of Defense, Program Analysis and Evaluation and the office of the Director of Logistics, Joint Chiefs of Staff, identified as co-leads and study management, as well as study participants to include representatives from the military services, combatant commands, and contractors employed by any of the aforementioned DOD organizations to provide input to or services in support of the MCS. GAO-05-659R Defense Transportation

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