eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences April 2009 21 1 185 192 jusps-B 1094 article V. K. Pathak and 1 B.L. Dewangan 2 Govt. PG College, Dhamtari (INDIA) Govt. Polytechnic College, Dhamtari (INDIA) <p style="text-align: justify;">This paper deals with the performance evaluation of a Shaping mill system involving four essential components viz. one main unit, two associate units and one independent unit. Only one repairman is used for repairing the failed components of all the units. Taking failure rates as exponential and arbitrary repair rates, various system effectiveness measures such as transition probabilities, mean time to system failure, availability, busy period of repairman are calculated. At last profit analysis is done on the basis of above measures.</p> https://ultraphysicalsciences.org/paper/1094/ Structural and Physical Naturally Chalcopyrite