A Historic Data Quality Monitor (HDQM) tool for the CMS Tracker Detector

Monitoring the time evolution of data related observables is important for the successful operation of the LHC experiments. It permits keeping control on data quality during LHC running and also effectively checking the influence on data of any detector calibration performed during the year. The Historic Data Quality Monitor (HDQM) of the CMS experiment is a framework developed by the Tracker group of the CMS collaboration that permits a web-based monitoring of the time evolution of interesting quantities (i.e. signal to noise ratio, cluster size) in the Tracker Silicon micro-strip and pixel.