Page 606 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 1 2.1 Implementation and Communication Best Practices

Best
Best Practice 12.1Practice 12.1Practice 12.1
Best
Obtain and maintain continued management support for A review of past failed machinery reliability recommendations has
machinery reliability issues by: shown:
1. Preparing a brief statement of the specific reliability issue. A lack of concise identification of the cost impact of the issue on
2. Clearly stating the impact of the issue on plant safety, reliability and plant revenue.
revenue (cost of unavailability). The failure to identify the savings to be gained by implementation of
3. Presenting the reliability improvement plan and its impact on the proposed reliability improvement recommendation.
improved safety, reliability and revenue.
4. Defining the total cost of implementing the reliability improvement
Benchmarks
plan.
This best practice has been recommended to clients since 1990.
5. Showing the cost savings of executing the proposed reliability
It has resulted in a significantly increased recommendation imple-
improvement plan.
mentation rate (above 50%) and increased machinery safety and
6. Providing timely updates detailing the progress of the reliability
improvement program. reliability.
Lessons Learned
A low implementation rate of reliability improvement
recommendations is usually the result of poor presentation
to plant management.

B.P. 12.1. Supporting Material
Reliability optimization is an important part of plant revenue
and profit. The objective of this section is to provide information
that will enable the reader to optimize reliability by imple-
menting proven methods I have used throughout my career. The
major components of reliability improvement are shown in
Figure 12.1.1.
Before these objectives can be met and implemented,
a number of important concepts and terms need to be reviewed
and presented.

To optimize site rotating equipment availability by implementation of
practical:
Site reliability audits
Assessment methods
Availability improvement plans
Condition monitoring techniques
Preventive and predictive maintenance plans
Troubleshooting techniques Fig 12.1.2 The objectives

Fig 12.1.1 Reliability improvement objectives
It is important to understand that the life span of rotating
equipment is extremely long compared to the specification,
The end user’s objectives design and installation phase. Refer to Figure 12.1.3.
A typical installation will have a specification, design and
The objectives of the end user are shown in Figure 12.1.2. installation phase of only approximately 10% of the total life of
In order to maximize profit, a piece of machinery must have the process unit. Improper specification, design or installation
maximum reliability, maximum product throughput and mini- will significantly impact the maintenance requirements, main-
mum operating costs (maximum efficiency). In order to achieve tenance cost and availability of a particular piece of machinery.
these objectives, the end user must play a significant part in the Proper screening of equipment design (pre-bid technical meet-
project during the specification and design phase, and not only ings etc.) prior to equipment vendor selection establishes the
after the installation of the equipment in the field. Effective foundation on which reliability is built. Likewise, enforcing
field maintenance starts with the specification phase of a project. shipment, construction, installation and commissioning specifi-
Inadequate specifications in terms of instrumentation and the cations optimizes reliability and truly makes it ‘cost effective’ in
location of instrumentation will impact equipment reliability. terms of the life cycle of the equipment.

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