A system has three components and all three components need to be operational 24 hours;
Monday to Friday. During a particular week, failure of component 3 occurred as follows:
•Monday = 6 PM to 9 PM
•Tuesday = 8 AM to 10 AM
•Wednesday = No failure
•Thursday = 8 PM to 9 PM
•Friday = No failure
•Saturday = 5 AM to 8 AM
•Sunday = 6 PM to 9 PM
What is the mean time to repair component 3?
A.
2 Hours
B.
4 Hours
C. 6 Hours
D.
8 Hours
Mon – hours to repair=3
Tue – hours to repair=2
Wed – hours to repair=0
Thu – hours to repair=1
Fri – hours to repair=0
Total hours to repair=6 divided by number of repairs=3
6/3=2
Mean time to repair (MTTR) = 2
0
0