This paper is carried out to examine the potential to improve productivity by optimizing the grinding circuit (e.g. separator performance), measuring cement fineness by different fineness indicating parameters, to obtain the separator efficiency under different separator speeds This will allow to determine the effect of adjusting parameters on the specific surface area and particle size distribution of the final product and This is used to determine the effect of adjusting parameters on the specific surface area and  particle size distribution of the final product using Markov chain model.  The evaluation of the separator performance test shows that separator efficiency is good, bypass is low and sharpness of separation is sufficient.