Maintenance Technology April 2017 - 56

FINAL THOUGHT

Human Reliability:
More Than Half the Answer

Dr. Klaus M. Blache
Univ. of Tennessee
Reliability &
Maintainability
Center

56 |

M

y prescription for achieving
reliability incorporates
human reliability.
This human element
consists of people, processes
(engineering and machinery/
equipment), and products
that lead to best practices and
customer deliverables. In short,
the better you do things, the more
availability and throughput you get.
Reliability is about dependable
engineering processes that support designingin and sustaining machinery/equipment (M&E),
maintenance practices to enable early detection of
issues, and specifications that guide the purchase of
maintainable M&E. Aspects to consider include:
1. Accessibility
■ easing access in performing maintenance
■ eliminating the need for special
tools to gain access
■ designing out the need to remove components
and other items that haven't failed to get to those
that often do fail.
2. Modularity
■ making each equipment module easy to handle
by one person
■ ensuring that disposable modules are
easy to reach
■ designing out the need to dispose of long-life
parts by using disposable parts.
3. Diagnostics
■ capturing enough data for problem analysis
■ analyzing faults and issues down to the
component level
■ ensuring that performance data is captured
and stored for analysis, supplier feedback, and
internal continuous-improvement teams.
To me, maintainability refers to the "ease and
speed of maintenance to return the system (people,
process, machinery/equipment, and product) back
to its original operating condition." Maintenance is
the repairing or servicing of a product or machinery/
equipment. Maintainability is a design parameter
(like the preceding examples) to minimize or
optimize repair time.
Unfortunately, research shows that human error
is still occurring at a high rate. Failure-rate studies
have found that more than 50% of all equipment

MAINTENANCE TECHNOLOGY

fails prematurely after maintenance work
has been performed on it. This has
been evidenced in many types of
equipment systems and organizations. To better understand how
human performance influences
risk associated with nuclear
power plant operations, the U.S.
Nuclear Regulatory Commission
(NRC) requested a study (INEEL/
EXT-01-01166) that showed the
average human-error contribution
to the increase in risk was 62%. In the same
study, maintenance practices and maintenance-work
control errors were evident in 76% of the events, and
operations errors were present in 54%.
What can be done? For new M&E, there's an
opportunity to design-in numerous maintainability
concepts. More opportunity, however, is in existing
facilities. A good first step would be to perform a PM
Optimization (PMO) to eliminate any unnecessary
tasks and related interventions.
A PMO will pinpoint if the M&E requires further
design review, changes, and frequency in how
those reviews are performed, or if they should be
eliminated. Mature operations have lots of mistakeproofing and visual controls for operations. This
technique should be expanded to include maintenance to support maintainability needs and reduce
availability risk.
Human reliability is related to the field of human
factors (ergonomics), which refers to designing
work areas, work practices, and workflow to
accommodate the capabilities of people (operators
and maintainers). These factors can't be ignored.
This applies to all types of industries. According to
the Occupational Safety & Health Administration
(OSHA), 30% to 50% of your recordable injuries are
somehow related to ergonomics.
Understanding and instilling human reliability, in
turn, is the key in interconnecting the daily functional links to reliability and maintenance that drive
real-world outcomes in availability. And it's more
than half of the answer. MT

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.
APRIL 2017



Table of Contents for the Digital Edition of Maintenance Technology April 2017

Maintenance Technology April 2017 - 1
Maintenance Technology April 2017 - Cover1
Maintenance Technology April 2017 - Cover2
Maintenance Technology April 2017 - 1
Maintenance Technology April 2017 - 2
Maintenance Technology April 2017 - 3
Maintenance Technology April 2017 - 4
Maintenance Technology April 2017 - 5
Maintenance Technology April 2017 - 6
Maintenance Technology April 2017 - 7
Maintenance Technology April 2017 - 8
Maintenance Technology April 2017 - 9
Maintenance Technology April 2017 - 10
Maintenance Technology April 2017 - 11
Maintenance Technology April 2017 - 12
Maintenance Technology April 2017 - 13
Maintenance Technology April 2017 - 14
Maintenance Technology April 2017 - 18
Maintenance Technology April 2017 - 19
Maintenance Technology April 2017 - 20
Maintenance Technology April 2017 - 21
Maintenance Technology April 2017 - 15
Maintenance Technology April 2017 - 16
Maintenance Technology April 2017 - 17
Maintenance Technology April 2017 - 18
Maintenance Technology April 2017 - 19
Maintenance Technology April 2017 - 20
Maintenance Technology April 2017 - 21
Maintenance Technology April 2017 - 22
Maintenance Technology April 2017 - 23
Maintenance Technology April 2017 - 24
Maintenance Technology April 2017 - 25
Maintenance Technology April 2017 - 26
Maintenance Technology April 2017 - 27
Maintenance Technology April 2017 - 28
Maintenance Technology April 2017 - 29
Maintenance Technology April 2017 - 30
Maintenance Technology April 2017 - 31
Maintenance Technology April 2017 - 32
Maintenance Technology April 2017 - 33
Maintenance Technology April 2017 - 34
Maintenance Technology April 2017 - 35
Maintenance Technology April 2017 - 36
Maintenance Technology April 2017 - 37
Maintenance Technology April 2017 - 38
Maintenance Technology April 2017 - 39
Maintenance Technology April 2017 - 40
Maintenance Technology April 2017 - 41
Maintenance Technology April 2017 - 42
Maintenance Technology April 2017 - 43
Maintenance Technology April 2017 - 44
Maintenance Technology April 2017 - 45
Maintenance Technology April 2017 - 46
Maintenance Technology April 2017 - 47
Maintenance Technology April 2017 - 48
Maintenance Technology April 2017 - 49
Maintenance Technology April 2017 - 50
Maintenance Technology April 2017 - 51
Maintenance Technology April 2017 - 52
Maintenance Technology April 2017 - 53
Maintenance Technology April 2017 - 54
Maintenance Technology April 2017 - 55
Maintenance Technology April 2017 - 56
Maintenance Technology April 2017 - Cover3
Maintenance Technology April 2017 - Cover4
http://www.nxtbook.com/atp/MaintenanceTechnology/epfeb2020
http://www.nxtbook.com/atp/MaintenanceTechnology/epjan2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epnovdec2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epseptoct2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epmay2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epapril2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epfebruary2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epjanuary2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epdecember2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epnovember2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epoctober2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epseptember2019
http://www.nxtbook.com/atp/MaintenanceTechnology/epaugust2018
http://www.nxtbook.com/atp/MaintenanceTechnology/0818schneider
http://www.nxtbook.com/atp/MaintenanceTechnology/epjuly2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epjune2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epmay2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epapril2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epfebruary2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epjanuary2018
http://www.nxtbook.com/atp/MaintenanceTechnology/epdecember2017
http://www.nxtbook.com/atp/MaintenanceTechnology/epnovember2017
http://www.nxtbook.com/atp/MaintenanceTechnology/epoctober2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtsept2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtaugust2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjuly2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjune2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtmay2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtapril2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtmarch2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtfebruary2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjanuary2017
http://www.nxtbook.com/atp/MaintenanceTechnology/mtdecember2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtnovember2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtoctober2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtseptember2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtaugust2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjuly2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjune2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtmay2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtapril2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtmarch2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtfebruary2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtjanuary2016
http://www.nxtbook.com/atp/MaintenanceTechnology/mtdecember2015
http://www.nxtbook.com/atp/MaintenanceTechnology/mtnovember2015
http://www.nxtbook.com/atp/MaintenanceTechnology/mtoctober2015
http://www.nxtbook.com/atp/MaintenanceTechnology/mtseptember2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTAugust2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTJuly2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTJune2015
http://www.nxtbook.com/atp/MaintenanceTechnology/M
http://www.nxtbook.com/atp/MaintenanceTechnology/0415endress
http://www.nxtbook.com/atp/MaintenanceTechnology/MTApril2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTMarch2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTFebruary2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTJanuary2015
http://www.nxtbook.com/atp/MaintenanceTechnology/MTDecember2014
http://www.nxtbook.com/atp/MaintenanceTechnology/MTNovember2014
http://www.nxtbook.com/atp/MaintenanceTechnology/MTOctober2014
http://www.nxtbook.com/atp/MaintenanceTechnology/MTSeptember2014
http://www.nxtbook.com/atp/MaintenanceTechnology/MTAugust2014
http://www.nxtbook.com/atp/MaintenanceTechnology/MTJuly2014
http://www.nxtbookMEDIA.com