Gaynor Taylor is Professor of Systems Design and currently Head of the Department of Electronic Engineering at the University of Hull. She has been a member of the academic staff of the university since 1980 and is involved in teaching courses on CAD for VLSI and research into test pattern generation and design for testability for both digital and mixed analogue and digital devices. Prior to joining the university she spent a number of years at the GEC-Marconi Research Laboratories at Great Baddow where she was involved in the development of GAD tools for digital circuits and for passive filters. She received her BSc, MSc and PhD degrees from UMIST and is a Chartered Engineer and Fellow of the IEE. Gordon Russell has been on the academic staff of the Department of Electrical and Electronic Engineering at the University of Newcastle upon Tyne since 1979, where he has been involved in teaching and research into CAD tools for VLSI circuit design and design for testability techniques. He has also been involved in a number of SERC and DTI funded research projects in these areas. Before joining Newcastle University he spent five years at Edinburgh University, involved in a range of CAD activities, first in the Department of Computer Science, then in the Department of Electrical Engineering and finally in the Wolfson Microelectronics Institute. He is coauthor/coeditor of five books related to testing and other aspects of CAD for VLSI and has given a number of invited lectures at universities throughout Europe on the application of expert systems to test pattern generation and design for testability. He is a Chartered Engineer and a member of the IEE and IEEE. He received his BSc and PhD degrees from the University of Strathclyde.