Siemens defines the digital twin as a single, evolving digital representation of a physical entity that enables closed-loop feedback between virtual and real systems. Supported by digital threads, it spans the full lifecycle—from design and production to sustainment—capturing data for traceability and decision-making. Siemens identifies product, production, and system twins, with extensions like executable twins (xDT) for real-time simulation. Digital threads tailored for defense include mission-driven systems engineering, smart manufacturing, verification, and sustainment. Through the Xcelerator platform, Siemens integrates software, hardware, and services to optimize design, operations, and long-term performance.

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