TÜLİN ERÇELEBİ AYYILDIZ was born in Denizli, Turkey, in 1981. She received her B.S. and M.S. degrees in Computer Engineering and her Ph.D. degree in Information Systems from the Middle East Technical University (METU), Ankara, in 2005, 2008, and 2015, respectively. From 2006 to 2008, she was a research assistant at the Computer Engineering Department at Hacettepe University. From 2008 to 2015, she was a research assistant at the Computer Engineering Department at Başkent University. Since 2017, she has been an assistant professor at the Computer Engineering Department at Başkent University. Her research interests include software engineering, software measurement, software effort estimation, software quality metrics, and software project management.