The scope of the present document is to specify Key Performance Indicators (KPIs) that can be used to compare the efficiency@ performance and security of Next Generation Protocols (NGPs) against current networking protocols. The relative importance of each KPI depends on the scenario in which protocols are being compared. Therefore@ this document provides guidelines for weighting the KPIS to help arrive at a meaningful comparison. Scenarios of particular relevance are detailed in ETSI NGP GS 001 [1]@ with resulting requirements listed in ETSI NGP GS 005 [2].