A method and apparatus for integrating a software application into an information technology (IT) infrastructure. An inventory is created using a Model-Driven Architecture (MDA) approach from the Object Management Group (OMG). The inventory includes information about: each component of the IT infrastructure, the software application, how each component communicates with each other component, and how the software application communicates with each component. Each element of information in the inventory has a single source and owner. The inventory is used to analyze the IT infrastructure and the software application during integrating the software application. From contents of the inventory, using the MDA approach from the OMG, artifacts that execute the integration are generated, and test programs are generated to verify that the integration is complete and correct. The inventory is progressively updated during and after the integration as more information about the IT infrastructure or the software application is developed.