Lincoln Electric IM8000 CHECKPOINT - Manual (Page 166)

Appendix B. Overall Equipment Efficiency Examples Availability Example 3
B.4 CheckPoint™ User Manual IM8000
Availability Example 3
To further highlight how CheckPoint™ calculates the Availability factor based on data it receives, assume
the following states for a welder. The states occurred for a welder at Worldwide Industrial during the
Morning shift (7:00 AM to 1:00 PM) one day. (Bold = Planned Downtime Scheduled.)
Table 14.5 Example Status Times
State From To Is Planned Downtime Scheduled? Total Minutes
Idle 7:00 AM 7:05 AM No 5
Welding 7:05 AM 7:30 AM No 25
Faulted 7:30 AM 7:31 AM No 1
Disconnected 7:31 AM 8:30 AM No 29 and 30
Welding 8:30 AM 8:35 AM No 5
Faulted 8:35 AM 9:45 AM No 25 and 45
Idle 9:45 AM 10:00 AM No 15
Idle 10:00 AM 10:05 AM Yes 5
Disconnected 10:05 AM 11:00 AM Yes 55
Disconnected 11:00 AM 11:10 AM No 10
Faulted 11:10 AM 11:30 AM No 20
Faulted 11:30 AM 12:00 PM Yes 30
Disconnected 12:00 PM 1:00 PM No 60
Availability for Each Hour
If you add up the number of minutes the welder spent in each state during each hour and translate that
into the Availability variables, it results in the figures in Table 14.6.
Notice how the Availability is 0% during the 10:00 AM hour. This is because Planned Downtime was
scheduled for the entire hour. The Availability for the 12:00 PM hour is also 0%. However, this is because
the machine was disconnected the entire hour, and no Planned Downtime was scheduled.
Table 14.6 Availability Factor for Each Hour *
Hour Disconnected
Time Asset Sched.
Time Planned
Downtime Planned
Prod. Time Unplanned
Downtime Operating
Time Availability
7:00 AM 29 31 0 31 1 30 97%
8:00 AM 30 30 0 30 25 5 17%
9:00 AM 0 60 0 60 45 15 25%
10:00 AM 0 60 60 0 0 0 0%
11:00 AM 10 50 30 20 20 0 0%
12:00 PM 60 0 0 0 0 0 0%
* All times listed in minutes.