Review paper: A Briefing to Grey Systems Theory

Abstract

Grey systems theory, probability theory, fuzzy systems theory and rough set theory are known as four uncertain systems scientific methodologies. After thirty years of development, grey systems theory has formed its own disciplinary framework, whose content includes grey philosophy, grey mathematics, processing and technology systems of grey information, as well as grey systems engineering. However, as a developing area of scientific activities, a lot of theoretical contents are still imperfect and awaiting further studies. The purpose of this paper is to acquaint the readers with the development history, the main content and the major challenges of grey system theory. It is our hope that this paper could play the role of attracting the attention of the international academic community to the theory so that the development of this theory could be further promoted.