Lincoln Electric IM8000 CHECKPOINT - Manual (Page 122)

Chapter 9. Overall Equipment Efficiency (OEE) Calculations of OEE in CheckPoint™
9.8 CheckPoint™ User Manual IM8000
Variable Description
Unplanned
Downtime Unplanned Downtime is the amount of time that stops Planned Production (e.g.,
equipment failures, material shortages and changeover times). CheckPoint™
determines Unplanned Downtime using the two of the welder statuses:
ƒ Idle: When the Idle time of the welder exceeds the Idle Time Threshold set for
the welder (page 4.21), CheckPoint™ flags this as Unplanned Downtime.
Otherwise, the Idle time is not included in the Availability calculation.
ƒ Faulted: The Faulted state of a machine is automatically Unplanned
Downtime, and CheckPoint™ uses this in the Availability calculation.
The Welding and Disconnected statuses are not included in the Availability
calculation.
Performance Factor
The Performance factor compares the actual Operating Time (during the time period you select for the
report) to the Planned Operating Time for the time period you select (e.g., a month, a shift, an hour). The
OEE calculation for Performance is the following:
ܲ݁ݎ݂݋ݎ݉ܽ݊ܿ݁ =
ܰ݁ݐ ܱ݌݁ݎܽݐ݅݊݃ ܶ݅݉݁
ܩݎ݋ݏݏ ܱ݌݁ݎܽݐ݅݊݃ ܶ݅݉݁
CheckPoint™ calculates the Performance factor as the ratio of Arc On Time to the Planned Arc On Time.
Your CheckPoint™ administrator established the Planned Arc On Time in the Planned Arc Time Per Hour
field at the Company Site level, Container level and/or Welding Power Source level (page 4.21).
ܲ݁ݎ݂݋ݎ݉ܽ݊ܿ݁ =
ܣݎܿ ܱ݊ ܶ݅݉݁
݈ܲܽ݊݊݁݀ ܣݎܿ ܱ݊ ܶ݅݉݁
NOTE | For Arc On Time, CheckPoint™ starts with the first weld
time and ends with the last weld time for each working
segment.
For example, the time period covered in the report is
11:00 AM to 12:00 PM. The first weld performed during
that hour started at 11:03 AM and the last weld performed
began at 11:59 AM and lasted two minutes. Both welds
would be included in the Performance factor for the
11:00 AM to 12:00 PM hour.
For example, at Advanced Manufacturing, John wanted to see his Overall Equipment Efficiency (OEE)
figures for last Friday’s morning shift. He clicked the Company Site in the Asset Tree, clicked the OEE tab
and generated a custom OEE report, setting the specific date and selecting the Morning shift. To calculate
the Performance factor for the Key Plant Lead Arc (Figure 9.8), CheckPoint™ used the following data:
ƒ Shift Length: 8 hours
ƒ Planned Arc Time: Since John is just starting out with OEE, he set the Planned Arc Time Per Hour
only at the Company Site level when he set up the OEE features. He set this for 30 minutes.