Generating Business Process Execution Language (‘BPEL’) control flows to populate a data warehouse for analysis of data of an operational system including identifying source tables in the operational system and one or more corresponding target tables in the data warehouse; creating BPEL steps to represent links between each source table in the operational system and each corresponding target table in the data warehouse; determining a sequence for the BPEL step; and adding the BPEL steps to a BPEL control flow according to the determined sequence.