The other options, while also viable, are not better than option 3. There are pros and cons to each of the three available alternatives, which must be evaluated to create the context necessary to pick one of them. First, option 1 (To continue operation while monitoring the vibration and bearing) may be favorable in the sense that it may ensure that the generation of electricity continues for a longer time. It would also keep the Senior Management happy because their wish to have continued operation and electricity generation would be fulfilled. The Plant would also have a chance of making the monthly requirements for electricity generation. The negative side of picking option 1 (Cons) are that first, it is not possible to tell how long the fan would operate without breaking down. The problem with this is that it may happen unexpectedly and there is no guarantee that it will last the three days of the month remaining. Secondly, accidents may happen with the continued use of the fan. Possible accidents include fire caused by ignition of fuel and accidents caused by dislodged parts.
For the option 2 (Reducing the boiler operation level to reduce vibration and bearing temperature), the advantage is that the risk of accidents is reduced. It is also correct to say that the fan life may be extended for duration of time that id longer than that of option 1. In addition, the production of electricity will not be halted and this will lead to a level of contribution closer to the target. The disadvantage is that the risk of an accident still exists and that in the long-run, this will lead to reduced electricity generation. In addition, there is extended fan damage.
Option 3 is better than option 1 and 2 because, as detailed in the first paragraph, its advantage is that it avoids accidental injury, fire or loss of equipment; prevents further damage to the fan and that in the long run, it will have saved more hours of production than option 1 and 2. The disadvantage may be failure to meet production targets.
OHSB. "Brief Accident Cases of Boilers and Pressure Vessels in Hong Kong ." Occupational Health and Safety Board 3.2 (2008): 1-20. Print.
Rayaprolu, Kumar. Boilers: a practical reference. New York, N.Y.: McGraw-Hill, 2013. Print.