ISO-NE, NEPOOL and the PTO-AC file the second phase of improvements to the Economic Study process (“Phase 2 Changes”).  The Phase 2 Changes: (1) separate  System Efficiency Needs Assessments from reliability Needs Assessments;6 (2) establish a threshold for the issuance of a Request for Proposals (“RFP”) for System Efficiency Transmission Upgrades; (3) change the RFP process for System Efficiency Transmission Upgrades from the current two-phase RFP process to a single-phase RFP process; and (4) establish clearly defined metrics to evaluate System Efficiency Transmission Upgrade Proposals.  The Phase 2 Changes were filed in two parts — changes to the ISO-NE Tariff (part 1) and changes to the TOA (part 2).