Since the project’s inception in 2016, the GridAPPS-D team at PNNL has worked closely with its partners in industry and academia—as well as its advisory board of leading utilities—to develop the platform and the supporting resources. Here are some of the milestones, highlights, and achievements during the first three years of the project that set the stage to mature the platform and establish a robust GridAPPS-D ecosystem to realize and share the benefits more broadly among utilities.