Report #86 operationalized definition. A single contractor constitutes single-point-of-control architecture for a federal program category when ALL THREE empirical thresholds are met: (a) per-program market share exceeding 40%; (b) cross-program prime contract holdings across three or more unrelated Assistance Listings; (c) substitutability friction exceeding 12 months for an agency to transition to a competitor without service disruption. Maximus meets all three thresholds at CMS 1-800-MEDICARE + Healthcare.gov (100% / multi-program / >24mo friction proven by 2024 federal lawsuit forcing CMS to abandon early rebid). Maximus FAILS the threshold in Aidvantage student loans (25% — below the 40% cutoff) and VA MDE (~30% — below the cutoff). Engine framing: distinguishes true monopolistic capture from oligopolistic structural-recurrence — the latter is the more common pattern across the federal-services-throughput layer.