As we all know, today's smart grid initiatives have given rise to multiple emerging products and services from a growing number of suppliers. Utilities want choices among vendors' products. As smart grid technologies mature, the need to ensure interoperability of products from multiple vendors will become significant. Although standards-setting organizations strive to provide a level of safety, quality and consistence in their products, traditional laboratory environments cannot guarantee that products form multiple vendors will interoperate smoothly when combined in the real world. As smart grid interoperability standards are relatively new on the scene, it is all the more important to ensure the end-to-end integration and compatibility of technologies to be deployed.