PJM has identified the reliability and resilience benefits of PMU data observability across the PJM footprint. To achieve and maintain these benefits, a minimum coverage of Synchrophasor devices are needed. • A PMU placement provision is needed in the RTEP planning process to ‘opportunistically’ install Synchrophasor devices at minimal cost. Targeted (retrofit) PMU placement projects may be needed to ensure near-term PMU coverage needed by key Synchrophasor applications. • PJM sees an opportunity to incorporate PMU Placement as a prospective requirement in the RTEP planning process to establish a growth-cycle of new and replacement PMU devices. Adding such a requirement for an identified category of RTEP projects will be a low-cost, high-benefit implementation. • Such a requirement would require a long-lead notice for newly approved projects to include PMU devices in project costs and design documents.