The challenge of integrating large amounts of renewable energy resources into the electric sector requires updated transmission analysis techniques. Economic planning, primarily in the form of value-based planning over interconnection-wide areas, is needed before performing the traditional single-hour, capacity-based reliability analyses. This article looks at the transmission planning processes of leading organizations from various sectors - regional transmission organizations (RTOs), investor-owned utilities, and regional organizations-within the United States to illustrate what changes to the traditional transmission planning process are required to meet the present challenges.