Review on Quantitative Evaluation Model of Coordination Degree of Composite Systems

System coordination degree is an objective measure of the system coordination state, and it is the core of the quantitative evaluation method of system coordination development. From the perspective of methodology, the existing coordination evaluation models are analyzed. This paper makes comparisons on the key literatures from the research object, research method, and evaluation result. Based on it, this paper concludes the merits a drawbacks and the applicability of those research methods, hoping to play a reference role for the related research and application.