Disclosed is a method of qualifying a change to software modules in a data warehouse comprising a database storing a plurality of data sets and said plurality of warehouse software modules, the method comprising determining if a change has been made to any of the software modules; selecting the software modules which are affiliated with the change to construct a reduced schedule of software modules; identifying the tests which are affiliated with the change to thereby identify a reduced set of tests; executing the reduced schedule of warehouse software; running the reduced set of tests; and if no warehouse software execution errors arise and no warehouse test execution errors or failures arise, qualifying the change to the one or more software modules as a success.