Data warehousing is an important area of practice and research, yet few studies have assessed its practices in general and critical success factors in particular. Although many guidelines for implementation exist, most are derived from anecdotal evidence. A survey of data warehousing professionals was conducted to gain insight into data warehousing success issues. The results reveal that data warehousing success is a multi-faceted construct and that improved productivity is the most valued measure for success. The results also put clearly defined business needs/benefits and source data quality at the top of the list of critical success factors. In addition, different success factors were found to be significant for different success measures.