SIQual information system on quality contains information on the execution of Istat primary surveys and secondary studies and on activities developed to guarantee quality of the produced statistical information. The system is devoted to the navigation of metadata describing the production process and its characteristics: information content; phases and operations of the production process; activities to prevent, monitor and evaluate errors. Statistical information systems for data dissemination and their sources are also documented. In SIQual, primary surveys, secondary studies and statistical information systems are generically referred as statistical processes. Documentation of general interest or specific for a certain process is available in the "Documents" area of the system. SIQual also allows to consult statistical on-line data disseminated on the Web.