Calculate MTBF
Number of Machines
Time of Running
47
5640
1
40
1
50
1
75
50
5805
Expected Breakdowns and Maintenance Cost
Number of Breakdowns
Mumber of Months Breakdowns Occur
0
0
1
6
2
4
3
1
11
Policy
Number of Breakdowns
Cuurent
1.55
PM
2
It's less expesive to have machines breakdown
without service contract
Breakdown is $540.91
Service Contract is $900