Lincoln Electric IM8000 CHECKPOINT - Manual (Page 164)

Appendix B. Overall Equipment Efficiency Examples Availability Example 2
B.2 CheckPoint™ User Manual IM8000
Availability for Each Hour
Calculating the Availability factor for each hour results in the figures in Table 14.2.
Table 14.2 Availability Factor for Each Hour *
Hour Disconnected
Time Asset Sched.
Time Planned
Downtime Planned
Prod. Time Unplanned
Downtime Operating
Time Availability
7:00 AM 0 3595 0 3595 3595 0 0%
8:00 AM 0 3603 0 3603 3603 0 0%
9:00 AM 0 3614 0 3614 3333 281 8%
10:00 AM 0 3583 0 3583 1220 2363 66%
11:00 AM 0 3602 601 3001 1380 1621 54%
12:00 PM 0 3600 2999 601 601 0 0%
1:00 PM 0 3605 0 3605 1600 2005 56%
2:00 PM 0 3601 0 3601 1500 2101 58%
* All times listed in seconds.
Availability for the Entire Shift
To calculate the Availability for the entire shift, you use the totals from the various time columns with the
following results. Remember that when the start time of a weld occurs within the hour but ends in the next
hour, that weld’s duration, CheckPoint™ includes that duration in the hour in which it started. This is why
you see 28803 seconds for the shift, instead of the expected 28800 seconds (i.e., 8 hours x 60 minutes x 60
seconds).
Disconnected
Time Asset Scheduled
Time Planned
Downtime Planned Production
Time Unplanned
Downtime Operating
Time Availability
0 28803 3600 25203 16832 8371 33%
Availability Example 2
The Power Wave® C300 welder at Advanced Manufacturing was in the following status during the Morning
shift on 08/02/2013. Remember that Availability is 0% when the Asset Scheduled Time equals the Planned
Downtime.
Table 14.3 Data for Calculating the Availability Factor *
Time Stamp Status Duration Time in Planned Downtime Time Not in Planned Downtime
6:00 AM Disconnected 3603 0 3603
7:00 AM Disconnected 3602 0 3602
8:00 AM Disconnected 3603 0 3603
9:00 AM Disconnected 3602 0 3602
10:00 AM Disconnected 3583 0 3583
11:00 AM Disconnected 3602 1791 1811
12:00 PM Disconnected 3603 0 3603
1:00 PM Disconnected 3602 0 3602
2:00 PM Disconnected 3601 0 3601