Scope and Assumptions The following characteristics identify the scope of this document: ?QoS metrics in ATIS-0800008@ QoS Metrics for Linear Broadcast IPTV [3]@ contains all currently recommended QoS metrics. ?Scope and assumptions from QoS metrics in [3] are all applicable. ?Measurement methodologies are for further study. ?This document assumes the use of a MPEG-2 TS ISO/IEC 13818-1 Information technology ?C Generic coding of moving pictures and associated audio information: Systems C (2000) [10] stream format. Purpose The purpose of this document is to provide the industry with a first set of well-defined public service QoS metrics that are deployable and immediately useful.