shall be on a term basis. The term of any such appointment shall be specified by the Secretary at the time of the appointment. 935. Data analytics capability for support of enhanced oversight and management of the Defense Agencies and Department of Defense Field Activities (a) Data analytics capability required (1) In general By not later than September 30, 2020, the Deputy Chief Management Officer of the Department of Defense shall establish and maintain within the Department of Defense a data analytics capability for purposes of supporting enhanced oversight and management of the Defense Agencies and Department of Defense Field Activities. (2) Discharge through successor position If the position of Deputy Chief Management Officer of the Department of Defense is succeeded by another position in the Department, the duties of the Deputy Chief Management Officer under this section shall be discharged by the occupant of such succeeding position. (b) Elements The data analytics capability shall permit the following: (1) The maintenance on a continuing basis of an accurate tabulation of the amounts being expended by the Defense Agencies and Department of Defense Field Activities on their personnel. (2) The maintenance on a continuing basis of an accurate number of the personnel currently supporting the Defense Agencies and Field Activities, including the following: (A) Members of the regular components of the Armed Forces. (B) Members of the reserve components of the Armed Forces. (C) Civilian employees of the Department of Defense. (D) Employees of contractors of the Department, including federally funded research and development centers. (E) Detailees, whether from another organization or element of the Department or from another department or agency of the Federal Government. (3) The maintenance of a continuing basis of the following: (A) An identification of the functions being performed by each Defense Agency and Field Activity. (B) An accurate tabulation of the amounts being expended by each Defense Agency and