Abstract: Cement is a basic material for all types of construction. This paper deals with the probabilistic assessment of two reliability models of a clinker manufacturing system running in cement plants consisting of three components: crusher, roller mill and rotary kiln. The maintenance and rest are turned on over the span of no demand. Preventive/corrective maintenance and general checking is also done randomly for the system. The failure rate, repair rate and cost for repair/replacement have been calculated from the data referred from Shree Cement Ltd., Khushkhera, Rajasthan, India. The factors of system effectiveness including the profit incurred to the system are obtained using semi-Markov processes and regenerative point technique. Various results useful to cement industries are interpreted graphically. Furthermore, the outcomes of this study can be helpful to different cement plants by upgrading the components’ efficiency and planning for reliability increase.

Key words: clinker manufacturing system, regenerative process, probabilistic assessment, roller mill, rotary kiln