Efficient Plant March 2018 - 39

department | on the floor

By addressing these problems, many
small continuous improvements can be
made by teams motivated to eliminate waste.
The improvements raise the OEE percentage.
The best performing organizations have
both operations and maintenance working
as a team.

TEEP TELLS THE STORY
Wouldn't you want to measure just your
real improvement rate from a real baseline?
The best way to do that is to calculate TEEP
(Total Effective Equipment Performance). It's
OEE x utilization, with no other adjustments. You can only get a TEEP score of
100% by producing all good parts, at the fastest possible speed, running 24/7, without any
stops. TEEP will show your actual capacity

and measure real improvement. Remember,
it's all related.
In Maintenance Technology (Aug., 2017)
I stated that, "The foundational elements of
lean and reliability are so intertwined that
you can't accomplish lean without reliable
people, processes, and production machinery
and equipment." For example, based on my
North America benchmark study, top-quartile companies (lowest reactive maintenance)
average 7% higher OEE than 2nd- and
3rd-quartile companies, and have an 11%
higher OEE than the bottom quartile.
When I was trained at the Goldratt Institute on Theory of Constraints (TOC), it was
emphasized that every process has a single
constraint and that total process throughput can only get better by improving that

constraint. Use your throughputimprovement-analysis program, computerized-maintenance-management-system
data, bad-actor list, and productiondowntime data to identify the bottleneck.
Then do a baseline OEE calculation on the
bottleneck equipment to start the process. As
improvements take hold, you'll see your true
OEE improve. EP

Based in Knoxville, Klaus M. Blache
is director of the Reliability &
Maintainability Center at the Univ. of
Tennessee, and a research professor in the
College of Engineering. Contact him
at kblache@utk.edu.

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MARCH 2018

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