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Changing World of Maintenance
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Way Back
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Coal Mines Regulation Act, 1912
Coal Mines Regulation Act, 1912 Part 2 - Rule 3 (added in 1937)
Where a mechanical contrivance for ventilation is provided it shall be installed, used and maintained in accordance with the requirements of the inspector
Part 2 - Rule 5 (added in 1948) A competent person shall, once at least every 24 hours examine the state of the external parts of machinery and shall mark with chalk their initials on or near the machinery
Schedule 7 – Part 3 – Clause 40 (Electrical Section) added in 1952 All portable or mobile flameproof apparatus shall be efficiently overhauled and properly re-assembled under approved conditions once every two years, or as more often as may be required
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A Little Less Far Back
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Coal Mines Regulation Act, 1982 (Regulations Released in 1984) Section 103
The manager of a mine shall prepare a scheme for the systematic examination or testing of electrical apparatus and mechanical apparatus at the mine.
Coal Mines Regulation Act, 1982
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Coal Mines Regulation Act, 1982 (Regulations Released in 1984) Mechanical – Underground Mines (Part 67)
Clause 9. The mine mechanical engineer shall be in charge of all persons at the mine who have a duty to supervise or effect: (a) the installation of mechanical apparatus; (b) the examination and testing of mechanical apparatus before it is put into use after installation, re installation or repair; (c) the maintenance of mechanical apparatus in safe working condition when in use and in accordance with the requirements imposed by or under the Act; and (d) the systematic examination or testing of mechanical apparatus in accordance with the scheme in force at the mine under Section 103 of the Act.
Coal Mines Regulation Act, 1982
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We went off and labelled all assets with a number (DH001, LTU1 etc.) Engineers created a maintenance sheet for each item as best they could Engineers created a large matrix on the wall of their office to track the
maintenance activities (computers were really not available at this time) But where did the maintenance tasks list get developed from ? Local knowledge History or failures Legislation
Coal Mines Regulation Act, 1982
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Companies begin to have a higher expectation from the maintenance teams including outside the mining industry.
We, in mining, were not the only ones having trouble with managing our maintenance processes … in the outside world incorrect maintenance or poorly performed maintenance led to some catastrophic failures.
Expectations of Maintenance
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Maintenance Outside of Mining - 1978 Amoco Cadiz
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Maintenance Outside of Mining - 1984 Bhopal
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Maintenance Outside of Mining - 1986 Chernobyl
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Maintenance Outside of Mining - 1988 Piper Alpha
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Maintenance Outside of Mining - 1989 Exxon Valdez
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Maintenance Outside of Mining - 1989 Exxon Valdez
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The Changing World of Maintenance
What does your
organisation expect from
the maintenance
function?
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The Changing World of Maintenance
Fix it when it breaks
1940 1950 1960 1970 1980 1990 2000 2010 ……..
1st Generation
Higher availability Lower costs Longer asset life
Higher availability, reliability
and throughput Greater cost-effectiveness Greater safety Better product quality No damage to the
environment Longer asset life
2nd Generation
3rd Generation
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The Traditional View of Equipment Failure
Age
Cond
itiona
l Pr
obab
ility o
f Fail
ure LIFE Most items
wear out at about the same age
A small number of random failures
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Aircraft Industry
Aircraft system failures were contributing to 60 crashes per 1,000,000 take offs with 40 of these being contributed from equipment failure.
Believed in age related failures
Reduced the maintenance intervals
Resulting in more failures than before
US Government commissioned a study and report by United Airlines
Report was released and was titled “Reliability-centred Maintenance”
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The Reality of Failure
Pattern A: The “Bathtub Curve” High infant mortality, then a low level of random failure, then a wear-out zone.
Pattern B: The “Traditional View” Random failure then a wear-out zone.
Pattern C: Steady increase in the probability of failure.
Pattern D: A sharp increase in the probability of failure settling down to random failure.
Pattern E: Random Failure No relationship at all between how old it is and how likely it is to fail.
Pattern F: The “Reversed J Curve” High infant mortality then random failure.
A
B
C
D
E
F
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The Reality of Failure
Patterns D, E and F: Random Failures.
Patterns A, B and C: Age Related Failures
A
B
C
D
E
F
4 %
2 %
5 %
7 %
14 %
68 %
20
11 %
89 %
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The Changing View of Equipment Failure
3rd Generation
1940 1950 1960 1970 1980 1990 2000 2010 ……..
2nd Generation 1st Generation
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Growing Expectations of Maintenance
1940 1950 1960 1970 1980 1990 2000 2010 ……..
Fix it when it broke Individual approach
1st Generation (reactive) Scheduled overhauls Failure prevention Planning and controlled work
Condition monitoring Reliability Design for reliability and
maintainability Risk based strategies HAZOP (Process Industry) Consequence mitigation Participation / flexibility
/ multi skill / teamwork
2nd Generation (preventive)
3rd Generation (proactive)
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Less Far Back
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Coal Mines Regulation Act, 1982 (New Regulations Released in 1999) Clause 9
Standards of Mechanical Engineering Practice and Electrical Engineering Practice. A mine manager must in consultation with the mine mechanical engineer, establish standards of mechanical engineering practice for the mine Standards of competency for persons working with relevant equipment Standards for the design, installation, commissioning, operation, maintenance
(including servicing, repairing and overhauling) and decommissioning of relevant equipment at the mine
In the case of a mine, standards for the systematic examination and testing of relevant equipment at the mine for the purposes of a scheme in force under Section 103 of the Act
Coal Mines Regulation Act, 1982
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Almost Memorable
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Coal Mine Health and Safety Act 2002 (Regulations Released in 2006) Clause 20
Mechanical Engineering Management Plan. The mechanical engineering management plan for a coal operation must make provision for the following the standards of engineering practice for mechanical plant and installations
throughout their life cycle at the coal operation, including the following
Coal Mines Health and Safety Act, 2002
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Now
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Work Health and Safety (Mines) Act 2013 (Regulations Released in 2014) Part 2 – Clause 26
4) must prepare and implement a mechanical engineering control plan for the mine or petroleum site that sets out the means by which the operator will manage those risks
Schedule 10 – Part 2 (Underground Coal Mines) Mechanical Engineering Manager. a) to develop, supervise, monitor and review the mechanical engineering standards and procedures forming part of mining operations at the mine, and b) to supervise the installation, commissioning, maintenance and repair of mechanical plant at the mine.
Work Health and Safety (Mines) Act 2013
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Future and Now
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Where to from here?
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ISO 55000 is an international standard covering management of physical assets. Initially a Publicly Available Specification (PAS 55) published by the British Standards Institution in 2004 Gives guidance and a 28-point requirements checklist of good practices in
physical asset management ISO 55000 defines requirements for an asset management system, in the
same way as ISO 9001 specifies a quality management system ISO 55000 focuses on helping you develop a proactive lifecycle asset
management system. This supports optimisation of assets and reduces the overall cost of ownership while helping you to meet the necessary performance and safety requirements.
Future and Now - ISO 55000
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Major events lead to changes in legislation Maintenance developed is now developed using risk based principals Consideration of 6 failure patterns and not only age related failures Consideration of random failures Implementation of a Control Plan to manage risks from Mechanical Plant
through it’s entire life cycle Control Plans generally refer to a Number of Standards of Engineering
Practice Introduction of ISO 55000 which is an international standard covering
management of physical assets
Review
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All Over
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Thankyou for listening