QUESTION 2 (Maintenance and Reliability) - 23 marks a) Chatty Katty Cellphone Parts Company Limited produces 3000 cell phone chips per day. Three hundred (300) chips are tested for a period of 500 operating hours each. During the test, six (6) failed: two (2) after 50 hours, two (2) at 100 hours, one (1) at 300 hours and one (1) at 400 hours Determine the failure rate in terms of the following: i. Percentage of failure, FR(%). 12 marks] 11. Number of failures per unit-hour, FR(N) 13 marks Number of failures per unit-year [2 marks iv. If 300 of these chips are used in building the latest version of My Phone cell phone, how many cell phone failures can be expected per month? 14 marks Jamaica Electric Light Service Company Ltd has experienced a number of system failures over the past few months, as shown in Table 5 below, Tables Number of breakdowns Monthly frequency 0 3 1 2 2 3 3 3 Each time the system is down, the firm loses an average of 20 million USS in time and service expenses. They are considering signing a contract with a Canadian Utilities Company for preventive maintenance. With preventive maintenance, the system would be down on average only once per month. The monthly cost of preventive maintenance would be 4.5 million US$ a month b) Advise Jamaica Electric Light Service Company Ltd on which policy is more feasible, breakdown or preventive maintenance? (ALL supporting workings must be shown) [6 marks Explain any two 2) features of a good maintenance facility 12 marks de Determine the reliability for the system shown in Diagram B below 14 marks