The second principle is using multiple sources and procedures to collect comprehensive data. The process includes direct communication with company officers, analysis of public documents such as annual report and 10-K, collecting information from government and NGO, conduct interviews with representatives from various stakeholder groups, and scanning of media such as local and global news resources. All this data is analyzed by the firm who makes the social ranking to arrive at an aggregated CSP ranking. Such comprehensive data from several different resources can serve for triangulation, improving the reliability of the calculated result.