It is agreed that no single methodology is the best. The study of human development should be used to design a new methodology of SDLC. The Islamic way of life is based on a unique concept, guided by al-Quran. INSAN methodology is needed to assist SDLC process that more human-environment friendly. 
 Ahmad Sunawari Long, Jaffary Awang, Kamaruddin Salleh, Islam: Past, Present and Future, International Seminar on Islamic Thoughts Proceedings, 7-9 December 2004, Department of Theology and Philosophy, Faculty of Islamic Studies, Universiti Kebangsaan Malaysia.