; and (F) such other range deficiencies as the Secretary of the Air Force considers appropriate to identify. (4) A plan for balancing coalition training against training only for members of the Armed Forces of the United States at the JPARC. E Other Matters 351. Strategy to improve infrastructure of certain depots of the Department of Defense (a) Strategy required Not later than October 1, 2020, the Secretary of Defense shall submit to the congressional defense committees a comprehensive strategy for improving the depot infrastructure of the military departments with the objective of ensuring that all covered depots have the capacity and capability to support the readiness and material availability goals of current and future weapon systems of the Department of Defense. (b) Elements The strategy under subsection (a) shall include the following: (1) A comprehensive review of the conditions and performance at each covered depot, including the following: (A) An assessment of the current status of the following elements: (i) Cost and schedule performance of the depot. (ii) Material availability of weapon systems supported at the depot and the impact of the performance of the depot on that availability. (iii) Work in progress and non-operational items awaiting depot maintenance. (iv) The condition of the depot. (v) The backlog of restoration and modernization projects at the depot. (vi) The condition of equipment at the depot. (B) An identification of analytically based goals relating to the elements identified in subparagraph (A). (2) A business-case analysis that assesses investment alternatives comparing cost, performance, risk, and readiness outcomes and recommends an optimal investment approach across the Department of Defense to ensure covered depots efficiently and effectively meet the readiness goals of the Department, including an assessment of the following alternatives: (A) The minimum investment necessary to meet investment requirements under section 2476 of title 10, United States Code. (B) The investment