Guarding the performance and data quality of OmegaCAM/VST at ESO

OmegaCAM on the VST telescope at the Paranal Observatory has been supported by the ESO Quality Control group since the beginning of operations in 2011.  We will present the schema that monitors the performance of the instrument and controls the data quality throughout the years. It has been evolving with time, being constantly improved and adapted to new demands, but the main goals remain unchanged. The system includes continuous checks of the availability of required calibrations, assessing the quality of the calibration data, and monitoring the health of the instrument. Continuous feedback is provided to the Observatory about the status of the instrument and its data.
We will also discuss actual events from the life of OmegaCAM when our monitoring revealed problems with the instrument, and allowed for their quick repair.