John D. Musa is an independent consultant. He gives courses in software reliability engineering on a world wide basis. He has extensive experience as a software developer and manager. He has 21 years experience in software reliability engineering as one of the creators and leaders of the field, and was elected Fellow of the IEEE for his contributions. He has published over 80 papers and is principal author of the widely acclaimed pioneering book "Software Reliability: Measurement, Prediction, Application." He organized and led the transfer of software reliability engineering into practice within AT&T.