Accountants spend a considerable amount of time on the ETL process. Some estimate that almost 80% of the total time spent analyzing data is dedicated to the ETL process. The goal of ETL is to extract the required data from various systems, transform it so that it can be effectively analyzed and load it into the appropriate data analysis tool. Because the data often comes from different systems, is large in volume or has different formats, extensive ETL efforts are typically required before analysis can be performed.