((a)) ** .—** Each head of an element of the Department specified in paragraphs (1) through (10) of shall establish and maintain materiel readiness metrics to enable assessment of the readiness of members of the armed forces to carry out—
((1)) the strategic framework required by ; and
((2)) guidance issued by the Secretary of Defense pursuant to .
((b)) ** .—** At a minimum, the materiel readiness metrics required by subsection (a) shall address the materiel availability, operational availability, operational capability, and materiel reliability of each major weapon system by designated mission, design series, variant, or class.
((c)) ** .—**
((1)) Not later than one year after the date of the enactment of this subsection, each head of an element described in subsection (a) shall establish the metrics required by subsection (b) necessary to support the strategic framework and guidance referred to in paragraph (1) and (2) of subsection (a).
((2)) Annually, each head of an element described in subsection (a) shall review and revise the metrics required by subsection (b) and include any such revisions in the materials submitted to Congress in support of the budget of the President under .
((d)) ** .—** Not later than five days after the date on which the Secretary of Defense submits to Congress the materials in support of the budget of the President for a fiscal year, the Secretary of Defense shall submit to the congressional defense committees an annual report on major weapons systems sustainment for the period covered by the future years defense program specified by . Such report shall include—
((1)) an assessment of the materiel availability, operational availability, and materiel reliability for each major weapon system; and
((2)) a detailed explanation of any factors that could preclude the Department of Defense or any of the military departments from meeting applicable readiness goals or objectives, such as infrastructure, workforce, or supply chain considerations.
((e)) ** .—** Not later than five days after the date on which the Secretary of Defense submits to Congress the materials in support of the budget of the President for a fiscal year, the Director of Cost Assessment and Performance Evaluation shall submit to the congressional defense committees a comprehensive estimate of the funds necessary to meet the materiel readiness objectives required by subsection (c) through the period covered by the most recent future-years defense program. At a minimum, the Director shall provide, for each major weapon system, by designated mission design series, variant, or class, a comprehensive estimate of the funds necessary to meet such objectives that—
((1)) have been obligated by subactivity group within the operation and maintenance accounts for the second fiscal year preceding the budget year;
((2)) the Director estimates will have been obligated by subactivity group within the operation and maintenance accounts by the end of the fiscal year preceding the budget year; and
((3)) have been budgeted and programmed across the future years defense program within the operation and maintenance accounts by subactivity group.
((f)) ** .—** In this section:
((1)) The term “major weapon system” has the meaning given in .
((2)) The term “materiel availability” means a measure of the percentage of the total inventory of a major weapon system that is operationally capable of performing an assigned mission.
((3)) The term “materiel reliability” means the probability that a major weapon system will perform without failure over a specified interval.
((4)) The term “operational availability” means a measure of the percentage of time a major weapon system is operationally capable.
((5)) The term “operationally capable” means a materiel condition indicating that a major weapon system is capable of performing its assigned mission and has no discrepancies with a subsystem of a major weapon system.