The Quality Improvement System (QIS) is a software application that provides long-term storage and accessibility of clinical data for research, quality improvement initiatives, and reporting. All data collected by the T3 Software is stored in this permanent, in-hospital database of high-fidelity, normalized, clinical data to facilitate local and multi-center studies. The QIS leverages a proprietary database architecture which enables the fast retrieval of large volumes of ICU data for any number of current and former patients.