Rec. 1: The DoD OIG recommended that the Under Secretary of Defense for Acquisition and Sustainment require the Services, in coordination with the Defense Logistics Agency, to conduct an in-depth review of their respective spare parts forecasting process for Defense Logistics Agency-managed items. The review should evaluate the number and value of items forecasted, resources involved in the forecasting and collaboration processes, and the accuracy of the forecasts. The review should also determine how the Services can improve the process and establish a plan of action with milestones with specific areas for improvement to address the deficiencies identified in this report.