(solution) 30 identical machines are being used by a manufacturing concern. on the avg a machine runs for 25…

(solution) 30 identical machines are being used by a manufacturing concern. on the avg a machine runs for 25…

30 identical machines are being used by a manufacturing concern. on the avg a machine runs for 25 days after repair between two consecutive breakdowns. the average cost due to loss of production is rs 200 per breakdown. if standby machines are used, the daily cost per machine is Rs. 40. determine the optimum no. of standby machines, a constant failure rate may be assumed.