...Parametric analysis can also be applied to all design variables simultaneously, which forms an exhaustive search that, providing that the search grid is fine enough, will guarantee a global optimum solution. In order to perform complex parametric analyses on multiple parameters with more than a handful of alternative values each, a tool to generate commands for the simulation model to run, and to collect results afterwards will be needed. jEPlus has been developed as such a parametric tool for EnergyPlus.
To see jEPlus in action, check out this video: http://youtu.be/jBA7Q7npNK4
The source code of the jEPlus project is now hosted on GitHub: https://github.com/jeplus/jEPlus/