unit testing mapping supply chain sourcing pharmaceuticals oracle application express snowflake analytics functional requirement aviation greenplum inventory management fact constellation business analysis skype differential phase warehousing quality assurance metadata massive python gnu make purchasing power bi governance oracle database management accounts payable workbench chart datum (cartography) finance general ledger computer science software engineering agile methodology visualization parallel processing current source putty data warehousing cloud spotfire postgresql star schema ironpython data governance java azure data lake