A. Aranjo
Global Materials Intelligence, Inc., Virginia, United States
Keywords: critical-material supply chains, physics-constrained verification, elemental mass balance, DFARS 252.225-7052, neodymium-iron-boron magnets
Document-centered supply-chain review commonly tests records for completeness and internal consistency, but often does not test whether declared quantities are physically possible. A document set can be complete, signed, and internally consistent while describing an output that violates conservation of mass. Our working prototype extracts declared inputs, processes, and outputs from unstructured supplier documents and applies deterministic elemental mass-balance checks. Extracted claims are treated as untrusted hypotheses; the verification logic uses no machine learning. The architecture is designed for thermodynamic feasibility bounds under stated boundary conditions and empirical process-yield benchmarks, with hard-constraint violations and benchmark deviations reported separately by evidentiary weight. For a DFARS 252.225-7052 covered material, a declared feed of 1,250 kg praseodymium-neodymium alloy at 80.0 wt% elemental Nd supplies 1,000 kg Nd. A declared output of 4,500 kg sintered neodymium-iron-boron magnet at 24.0 wt% elemental Nd contains 1,080 kg Nd. The neodymium balance does not close. Absent another Nd source, inventory drawdown, or sufficient measurement uncertainty, the balance is physically inconsistent. Outputs report violations or no detected violation under stated assumptions and boundaries. They do not establish geographic origin or determine regulatory compliance. This turns documentary claims into reproducible physical checks for focused human review.