(a) For a compressor the probability of failure occurring during a given week is given in Table Q5(a). (1) Calculate the Annual Breakdown Maintenance Costs (where no Preventive Maintenance is carried out). The costs are 300 OMR to repair the compressor, every time it fails. (ii) Preventive maintenance costs 60 OMR for each service. Calculate if Preventive Maintenance is cheaper than Breakdown Maintenance, and if so how often Preventive Maintenance should be carried out. There are 48 working weeks in a year. Table Q5(a) Probability of failure during the given week Week of Operation 0.00 0.15 3 0.15 4 0.30 0.40

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(a) For a compressor the probability of failure occurring during a given week is given in
Table Q5(a).
(1) Calculate the Annual Breakdown Maintenance Costs (where no Preventive Maintenance is carried
out). The costs are 300 OMR to repair the compressor, every time it fails.
(ii) Preventive maintenance costs 60 OMR for each service. Calculate if Preventive Maintenance is
cheaper than Breakdown Maintenance, and if so how often Preventive Maintenance should be carried
out. There are 48 working weeks in a year.
Table Q5(a)
Probability of failure
during the given week
Week of Operation
0.00
0.15
3
0.15
4
0.30
0.40
Transcribed Image Text:(a) For a compressor the probability of failure occurring during a given week is given in Table Q5(a). (1) Calculate the Annual Breakdown Maintenance Costs (where no Preventive Maintenance is carried out). The costs are 300 OMR to repair the compressor, every time it fails. (ii) Preventive maintenance costs 60 OMR for each service. Calculate if Preventive Maintenance is cheaper than Breakdown Maintenance, and if so how often Preventive Maintenance should be carried out. There are 48 working weeks in a year. Table Q5(a) Probability of failure during the given week Week of Operation 0.00 0.15 3 0.15 4 0.30 0.40
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