Lucjan Stapp, PhD. Retired research and teaching employee of the Warsaw University of Technology, where for many years he gave lectures and seminars on software testing and quality assurance. Author of more than 40 publications, including 12 on various problems related to testing and quality assurance. As a tester, on his career path he moved from junior tester to test team leader in more than a dozen projects. Co-organizer and speaker at many testing conferences (including TestWarez – the biggest testing conference in Poland). Founding member of the Information Systems Quality Association (www.sjsi.org), currently its vice-president. Certified tester (including ISTQB® CTAL-TM, CTAL-TA, Agile Tester, Acceptance Tester).