report_year,source_document,finding_type,baseline_cost_usd_m,actual_or_revised_cost_usd_m,variance_pct,description
1994,GAO T-NSIAD-94-167 (Doc 1),lifecycle_cost_projection,,13100,,Projected total lifecycle cost at program inception: $13.1 billion
1994,GAO T-NSIAD-94-167 (Doc 1),ioc_timeline,,,,Initial Operational Capability projected at 12 years from program start (c. 2006)
1994,GAO NSIAD-94-107BR (Doc 2),flight_test_cost,2,20,900,One flight test estimated at $2M actually cost more than $20M (>900% overrun)
1994,GAO NSIAD-94-107BR (Doc 2),unit_cost,,,,Unit cost estimates already rising from original baseline by 1994
1994,GAO NSIAD-94-107BR (Doc 2),test_series_cost,,,,Full flight test series costs substantially exceeded Congressional budget projections
2007,GAO-07-387 (Doc 7),program_restructure,,,,Program restructured multiple times 1994–2007; each restructure reset cost baseline
2007,GAO-07-387 (Doc 7),acquisition_cost,,,,"Acquisition cost growth documented across EMD, LRIP, and full-rate production phases"
2007,GAO-07-387 (Doc 7),open_recommendations,,,,Multiple unresolved recommendations from earlier GAO reviews still pending
2007,GAO-07-387 (Doc 7),test_adequacy,,,,GAO flagged insufficient operational testing before full-rate production decision
2022,GAO-22-104344 (Doc 8),open_recommendations,,,,61 GAO recommendations to DoD on THAAD unaddressed as of 2022
2022,GAO-22-104344 (Doc 8),cost_growth_cumulative,,,,Cumulative cost growth from original 1994 baseline documented across all phases
2022,GAO-22-104344 (Doc 8),interceptor_unit_cost,,,,Per-interceptor cost significantly higher than original program estimates
2022,GAO-22-104344 (Doc 8),software_deficiencies,,,,Software reliability and testing gaps identified; open action items as of 2022
2022,GAO-22-104344 (Doc 8),schedule_slip,,,,Multiple schedule slips documented; IOC achieved 2008 vs projected 2006
2025,GAO-25-108187 (Doc 9),current_program_cost,,,,Most recent GAO assessment of program cost status; ongoing cost growth trajectory
2025,GAO-25-108187 (Doc 9),production_rate,,,,Production rate constraints limit interceptor inventory replenishment speed
2025,GAO-25-108187 (Doc 9),supply_chain_risk,,,,Single-source suppliers for critical components identified as risk factor
2025,GAO-25-108187 (Doc 9),open_recommendations,,,,Subset of 61 prior recommendations still unresolved at 2025 review
2026,CRS IF12645 v15 (Doc 6),emergency_supplemental,,3100,,$3.1B emergency supplemental appropriated post-Epic Fury to replenish inventory
2026,Lead IG OIR Q2 FY2026 (Doc 13),operational_cost,,,,Operational costs during Epic Fury engagement documented in Q2 FY2026 IG report