ENGINEERING BLOG
Technical research and engineering insights from the team building the operating system for responsible AI operations.
121 articles · Published by MARIA OS
Modeling defect rate as a state variable and applying control-theoretic stability analysis to manufacturing quality gates
Manufacturing AI systems face a stability problem that traditional software governance often does not: defect rates evolve as continuous dynamical variables under material variation, tool wear, and environmental drift. This paper models the manufacturing quality gate as a feedback-control system, derives Lyapunov stability conditions for gate equilibria, designs a PID-style controller to keep defect rates below tolerance under bounded disturbances, and extends the analysis to multi-stage quality cascades. In a semiconductor fabrication case study, the framework showed 94.7% defect containment with sub-200ms gate response time and BIBO-stability behavior under realistic disturbance profiles.
Minimizing safety risk subject to throughput maximization constraints using minimax optimization and responsibility-gated production decisions
Manufacturing throughput and worker safety are often treated as competing objectives. This paper introduces a minimax formulation that prioritizes worst-case safety risk minimization subject to throughput-floor guarantees. The Lagrangian dual form yields gate-threshold rules for production decisions, and MARIA OS responsibility gates enforce hard safety overrides at each node. In an automotive assembly-line simulation, the framework reported 99.7% safety compliance with a 3.2% throughput reduction versus unconstrained production.
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Complete list of all 121 published articles. EN / JA bilingual index.
121 articles
All articles reviewed and approved by the MARIA OS Editorial Pipeline.
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