Question 1 Kau shaft mine situated in Welkom has 90 mine workers who works underground daily. They use a lift to go underground and come back to surface. On Tuesday 12th October 2023, the lift transported 70 workers from surface to underground and came back to collect the remaining workers. On its way up at 6 am it stopped due to failure and the technician were called to fix the problem. At 9 am the problem was fixed and the lift managed to reach surface to collect the remaining workers. Use this one day information determine the following: a) System Average Interruption Frequency Index. b) System Average Interruption Duration Index. (4) c) Customer Average Interruption Frequency Index. (4) d) Customer Average Interruption Duration Index. (4) [12] Question 2 2.1 Briefly explain what make it difficult come up with maintenance budget? 2.2 As the maintenance manager, how do you determine the nature of maintenance to be adopted under a given situation? 2.3 What is the main objective of maintenance audit in maintenance department? (3) 2.4 How is information being collected during maintenance audit? [9] Question 3 3.1 As maintenance manager, what parameters must be kept in mind when setting up a new maintenance department? 3.2 Briefly describe the difference between decentralized and partially decentralized organizations. (6) 3.3 What adequate steps can lead to minimization of costs in maintenance organization? (6)