Assessment of education is the standardization imposed by the government to be followed by all universities in Indonesia. Fulfillment of national standards of education aims to ensure quality higher education practices and the quality of its graduates, One of the education practices assessment are assessment of the ratio of lecturers to students. This study aims to help the managerial prepare lecturers to facilitate the process of education and the accreditation process to be faced. Model used with expert system for its inferencing engine with the help of ARIMA forecasting algorithm to predict until the period of accreditation, Forecasting results show the model (1,1,0) which is eligible for prediction.