To limit the amount of authorization of appropriations for the Department of Defense unless the Secretary of Defense implements cost-saving recommendations contained in a certain study by the Defense Business Board, and for other purposes.

Department of Defense Waste Reduction Act This bill prohibits the appropriation to the Department of Defense (DOD) of supplemental funds for FY2017 or funds for FY2018 if the total for such fiscal year exceeds the amount authorized to be appropriated for DOD by the National Defense Authorization Act for FY 2017, unless: (1) DOD certifies to the congressional defense committees that it has evaluated and is implementing each recommendation for DOD cost savings contained in the Defense Business Board study titled "Transforming Department of Defense's Core Business Processes for Revolutionary Change"; or (2) if DOD is unable to make such certification, it submits a report explaining why it is not implementing any such recommendation and 30 days elapse following the report's submission.