On Friday, October 11, 2024, STIE Krakatau lecturer, Ryan Firdiansyah Suryawan, S.E., M.M, successfully completed the closed doctoral examination for the Management program at the Faculty of Economics and Business, Universitas Dr. Soetomo, with a dissertation titled: "Company Strategy in Increasing Company Value Through Customer Loyalty at Umrah Travel Agencies in Jakarta, Bogor, Depok, and Bekasi."