; and (2) submit to the appropriate committees of Congress a report on the results of the assessment under paragraph (1), including any recommendations for the removal of line items that do not directly contribute to a measurably safer and more efficient air traffic control system. 4111. Human factors (a) In general In order to avoid having to subsequently modify products and services developed as a part of NextGen, the Administrator shall— (1) recognize and incorporate, in early design phases of all relevant NextGen programs, the human factors and procedural and airspace implications of stated goals and associated technical changes; and (2) ensure that a human factors specialist, separate from the research and certification groups, is directly involved with the NextGen approval process. (b) Report Not later than 1 year after the date of enactment of this Act, the Administrator shall submit to the appropriate committees of Congress a report on the progress made toward implementing the requirements under subsection (a). 4112. Major acquisition reports (a) In general The Administrator shall evaluate the current acquisition practices of the Administration to ensure that such practices— (1) identify the current estimated costs for each acquisition system, including all segments; (2) separately identify cumulative amounts for acquisition costs, technical refresh, and other enhancements in order to identify the total baselined and re-baselined costs for each system