An assurance system for creating and evaluating a plurality of virtual application environments that emulate and evaluate a plurality of target systems. Information such as network configuration, interface information, and software packages or subsystems are imported into the virtual application environments. The assurance system may be used for purposes of testing, and delivering comprehensive reports of the likely results on the target systems based on results from the virtual application environments, including such things as configuration changes to the environments, environment load and stress conditions, environment security, software installation to the environments, and performance levels of the environments among other things.