; and (B) whether commercial, academic, or nongovernmental indices have any comparative benefit or advantage over governmental sources. (c) Periodic updates The Under Secretary of Defense for Acquisition and Sustainment shall periodically, and not less than once every 5 years, review and update the inventory required under subsection (a). (d) Guidance Not later than March 30, 2025, the Under Secretary of Defense for Acquisition and Sustainment, in coordination with the Service Acquisition Executives, shall issue guidance providing for the consistent application and maintenance of data included in the inventory required under subsection (a) for use by government contracting and pricing personnel. 817. Pilot program to incentivize progress payments (a) Pilot program The Under Secretary of Defense for Acquisition and Sustainment shall establish and implement a pilot program to incentivize large business concerns awarded Department of Defense contracts to qualify for progress payments up to 10 percentage points higher than the standard progress payment rate. (b) Incentives The Under Secretary for Acquisition and Sustainment shall establish clear and measurable criteria to provide for the payment to contractors of higher progress payments as described in subsection (a), including meeting one or more of the following criteria: (1) Adherence to delivery dates for contract end items and contract data requirement lists or compliance with the performance milestone schedule during the preceding fiscal year. (2) The lack of any open level III or IV corrective action requests. (3) Acceptability of the contractor's business systems without significant deficiencies. (4) Meeting small business subcontracting goals during the preceding fiscal year. (c) Report The Under Secretary for Acquisition and Sustainment shall submit to the Committees on Armed Services of the Senate and House of Representatives an annual report on the implementation of the pilot program established under subsection (a), including a comprehensive list of