After spending 30 years with Nortel Networks, where he held a number of engineering and management positions related to the specification, design, verification and standardisation of wireline and wireless products, Paul Coverdale took early retirement in 2004. Since then, he has acted as a consultant in the area of QoS/QoE and performance of telecommunications networks. Paul has been active for many years in both national and international Standards Forums dealing with voice quality and performance, including ITU-T, TIA, ETSI and IEEE, holding several leadership positions. He has been participating in ITU-T SG12 since 1983, where he is currently chair of WP3/12 “Multimedia QoS and QoE”. He is a member of the IET, IEEE, and is a registered Professional Engineer in the Province of Ontario, Canada. He has authored and co-authored several papers and holds ten patents.