; and (B) ensure that the Cell has a sufficient number of personnel to carry out the duties described in this subsection. (3) The Cell shall be independent of the Director of Cost Assessment and Program Evaluation. The head of the Cell shall report directly to the Secretary of Defense or the Deputy Secretary of Defense. (4) (A) Not less frequently than once every two years, the Cell shall conduct an alternative operational or strategic analysis of an analytical question identified by the Chairman of the Joint Chiefs of Staff under subparagraph (B). In conducting such alternative analysis, the Cell shall use assumptions different from the assumptions used by the Director of Cost Assessment and Program Evaluation for the original analysis of such question. (B) For purposes of each alternative analysis required under subparagraph (A), at an appropriate time before the commencement of such analysis— (i) the Director of the Joint Staff shall submit to the Chairman of the Joint Chiefs of Staff a list of not fewer than three operational or strategic questions previously studied by the Director of Cost Assessment and Program Evaluation that could potentially serve as the basis of for such alternative analysis; and (ii) from such list, the Chairman shall select one question to serve as the basis for such analysis. (f) Inclusion of risk estimates in certain submissions In any case in which the Director of Cost Assessment and Program Evaluation submits to the Secretary of Defense an analytical product that recommends not meeting or changing a requirement established by the Joint Requirements Oversight Council, the Director shall include with such submission— (1) a risk assessment that assesses any risks of the recommended course of action with respect to the execution of operational plans and the long-term ability of the armed forces to meet the needs of combatant commanders (as determined by the Secretary of Defense)