When thousands of devices power the world’s largest experiments, even a single failure can ripple across the system. At CERN, the smooth operation of accelerators and experiments relies on the control infrastructure, which comprises thousands of technical devices working in unison. These include programmable logic controllers (PLCs), which run industrial control logic, power supplies that feed magnets and detectors, and front-end modules that manage communication between equipment and higher-level systems.

Every second, the CMS tracker detector records millions of particle trajectories. But without careful quality checks, this flood of data risks being unusable for physics discoveries. To guard against this, CMS relies on a dedicated Data Quality Monitoring (DQM) system. The tracker, functioning like a giant digital camera, captures the paths of charged particles produced during collisions. Because it generates such an enormous volume of data, ensuring quality is essential for reliable physics analyses.