RQD 2020 is a major international conference event in the fields of reliability, risk assessment, quality in designs and statistics. For a quarter of a century, ISSAT RQD conference has brought together internationally renowned scholars, professors and researchers as well as scientists, engineers, practitioners, professionals and students worldwide to share, discuss and advance their research findings. The presented papers as well as keynote addresses were of high quality. ISSAT RQD conference has been greatly beneficial to its participants for their research and a starting place for many new collaborative works.