4 Discuss two reasons why a project manager would want to crash a projec and how he/she would go about crashing the project activities (5 marica Qusation 4 [24 marca 4.1 Explain briefly the difference between breakdown maintenance and preventive maintenance in operations Management (10 Marke 4.2 The Oshakati fire department has a number of failures with its oxygan masks and is evaluating the possibility of outsourcing preventive maintenance to the manufacturer. Because of the risks that are associated with fallure, the cost of each failure is estimated at NS2000. The current maintenance policy (using the station employees performing routine maintenance) has yielded the following historical information 5 Number of 0 1 2 breakdowns 0 4 5 5 Number of years 1 3 in which breakdowns occurred This manufacturer will also guarantee repairs of the oxygen masks on any and all failures as part of the service contract. The cost of this service is N$5 000 per year. a. What is the expected number of breakdowns per year with station employees performing maintenance? (5 Marks) b. What is the cost of the current maintenance policy? (2 Marks) c. What is the more economical policy? (2 Marks) soulstim expect systery 4.3 The Hage Geingob Medical School control system has three components in series with individual reliabilities (R1, R2, and R3) as shown below: 21 0.99 0.90 What is the reliability of this system? (5 Marks) TOTAL MARKS 100 4 Discuss two reasons why a project manager would want to crash a projec and how he/she would go about crashing the project activities (5 marica Qusation 4 [24 marca 4.1 Explain briefly the difference between breakdown maintenance and preventive maintenance in operations Management (10 Marke 4.2 The Oshakati fire department has a number of failures with its oxygan masks and is evaluating the possibility of outsourcing preventive maintenance to the manufacturer. Because of the risks that are associated with fallure, the cost of each failure is estimated at NS2000. The current maintenance policy (using the station employees performing routine maintenance) has yielded the following historical information 5 Number of 0 1 2 breakdowns 0 4 5 5 Number of years 1 3 in which breakdowns occurred This manufacturer will also guarantee repairs of the oxygen masks on any and all failures as part of the service contract. The cost of this service is N$5 000 per year. a. What is the expected number of breakdowns per year with station employees performing maintenance? (5 Marks) b. What is the cost of the current maintenance policy? (2 Marks) c. What is the more economical policy? (2 Marks) soulstim expect systery 4.3 The Hage Geingob Medical School control system has three components in series with individual reliabilities (R1, R2, and R3) as shown below: 21 0.99 0.90 What is the reliability of this system? (5 Marks) TOTAL MARKS 100