London: IMO. Serratella, G. Wang, R. Basu, R. OTC Paper , May. Spong, D. OMAE, June. Ministry of Defense UK. Moubray J. Reliability-centered Maintenance. New York: Industrial Press Inc. Nowlan, F. Smith, A. Society of Automotive Engineers. Resource Library. Careers Are you looking for an exciting and rewarding career with a stable, team-based and results-oriented organization? Risk-Based Asset Management Implementation Model Using our Risk Based Asset Management Implementation Model, Life Cycle Engineering will partner with you to build a risk-based asset management system that will: Help you appropriately prioritize how you spend time, money and materials fixing the most critical problems Provide the infrastructure for continuous improvement Help you meet your corporate business objectives, including regulatory compliance Asset Criticality Development A complete asset criticality assessment that supports improving asset management and reliability.
Learn More. Equipment Maintenance Plans and Job Plans Maintenance and job plans for your equipment that help eliminate bad actor problems and improve asset availability. Factory and Site Acceptance Testing Development of factory and site acceptance tests to ensure assets comply with functional specifications and best practices.
- Eighty Days of Faith;
- A Proactive Approach to Risk Management During Design.
- Petites histoires coquines à lire au bureau (French Edition)?
- Reliability-Centered Maintenance (RCM);
- Das Spannungsverhältnis von Medien und Militär am Beispiel des Irakkrieges (German Edition)?
- Risk Based Inspection (RBI3™) | The Aladon Network.
- Related Products.
Functional Specification Development Functional specifications to ensure that design and manufacture of an asset meets engineering and manufacturing best practices. Hierarchy Development Development of a well-structured asset hierarchy that improves equipment performance and productivity. Loss Elimination Identifying waste and losses that are adversely affecting plant performance and recommendations for corrective actions. Preventive Maintenance Optimization PMO Optimization of your current Preventive Maintenance program to incorporate industry best practices and improve equipment performance.
Reliability Audit and Assessment Assessment of your reliability program and maintenance activities to identify deficiencies that may adversely affect plant performance. Reliability-Centered Maintenance Study Evaluation of your RCM program and its ability to preserve system functionality of your critical assets. In addition, RCM recognizes that a difference often exists between the perceived design life and the intrinsic or actual design life and addresses this through the Age Exploration AE process.
RCM is Driven by Safety, Security, and Economics — Safety and security must be ensured at any cost; thereafter, cost-effectiveness becomes the criterion. RCM Defines Failure as "Any Unsatisfactory Condition" —Therefore, failure may be either a loss of function operation ceases or a loss of acceptable quality operation continues but impacts quality.
Time-directed tasks are scheduled when appropriate.
Better Reliability = Better Results = Better Life
Condition-directed tasks are performed when conditions indicate they are needed. Failure-finding tasks detect hidden functions that have failed without giving evidence of pending failure. Additionally, performing no maintenance, Run-to-Failure, is a conscious decision and is acceptable for some equipment. There are several ways to conduct and implement an RCM program.
- Archive Risk-based Management : A Reliability-Centered Approach.
- A Second Turn: Volume II: Episodes 4-6.
- Персона (Russian Edition).
- Wisdom from Above?
- The Jewels of Heaven (T.J. & Luna Book 1).
All are applicable. The decision of what technique to use should be left to the end user and be based on:. Benefits : Classical or rigorous RCM provides the most knowledge and data concerning system functions, failure modes, and maintenance actions addressing functional failures of any of the RCM approaches. Smith, and others. In addition, this method should produce the most complete documentation of all the methods addressed here.
In addition, rigorous RCM analysis is extremely labor intensive and often postpones the implementation of obvious condition monitoring tasks. Benefits : The intuitive approach identifies and implements the obvious, usually condition-based, tasks with minimal analysis. The intent is to minimize the initial analysis time in order to realize early-wins that help offset the cost of the FMEA and condition monitoring capabilities development.
Concerns : Reliance on historical records and personnel knowledge can introduce errors into the process that may lead to missing hidden failures where a low probability of occurrence exists. In addition, the intuitive process requires that at least one individual has a thorough understanding of the various condition monitoring technologies. Answers to these four questions can be used with the decision logic tree depicted in Figure 3, Reliability-Centered Maintenance RCM Decision Logic Tree , to determine the maintenance approach for the equipment item or system. Failure is the cessation of proper function or performance.
RCM examines failure at several levels: the system level, sub-system level, component level, and sometimes even the parts level. The goal of an effective maintenance organization is to provide the required system performance at the lowest cost. This means that the maintenance approach must be based on a clear understanding of failure at each of the system levels. System components can be degraded or even failed and still not cause a system failure.
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A simple example is the failed headlamp on an automobile. That failed component has little effect on the overall system performance. Conversely, several degraded components may combine to cause the system to have failed, even though no individual component has itself failed. A system is any user-defined group of components, equipment, or facilities that support an operational requirement. Most systems can be divided into unique sub-systems along user-defined boundaries.
The boundaries are selected as a method of dividing a system into subsystems when its complexity makes an analysis by other means difficult:. The function defines the performance expectation and can have many elements. Elements include physical properties, operation performance including output tolerances, and time requirements such as continuous operation or limited required availability. Functional failures are descriptions of the various ways in which a system or subsystem can fail to meet the functional requirements designed into the equipment.
A system or subsystem that is operating in a degraded state but does not impact any of the requirements addressed in System and System Boundary , has not experienced a functional failure. It is important to determine all of the functions of an item that are significant in a given operational context.
By clearly defining the functions' non-performance, the functional failure becomes clearly defined. For example, it is not enough to define the function of a pump to move water. The function of the pump must be specific and defined in such terms flow rate, discharge pressure, vibration levels, B 10 L 10 Life efficiency, etc. Reliability HotWire. Failure modes are equipment- and component-specific failures that result in the functional failure of the system or subsystem.
For example, a machinery train composed of a motor and pump can fail catastrophically due to the complete failure of the windings, bearings, shaft, impeller, controller, or seals. In addition, a functional failure also occurs if the pump performance degrades such that there is insufficient discharge pressure or flow to meet operating requirements. These operational requirements should be considered when developing maintenance tasks. Dominant failure modes are those failure modes responsible for a significant proportion of all the failures of the item.
They are the most common modes of failure. Not all failure modes or causes warrant preventive or conditioned based maintenance because the likelihood of their occurring is remote or their effect is inconsequential. The conditional probability of failure measures the probability that an item entering a given age interval will fail during that interval.
If the conditional probability of failure increases with age, the item shows wear-out characteristics. The conditional probability of failure reflects the overall adverse effect of age on reliability. It is not a measure of the change in an individual equipment item. Failure rate or frequency plays a relatively minor role in maintenance programs because it is too simple a measure. Failure frequency is useful in making cost decisions and determining maintenance intervals, but it tells nothing about which maintenance tasks are appropriate or about the consequences of failure.
A maintenance solution should be evaluated in terms of the safety, security, or economic consequences it is intended to prevent. A maintenance task must be applicable i. The percentage of equipment conforming to each of the six wear patterns as determined in three separate studies is also shown in both figures.
Reliability Centered Maintenance - WIDEPIN
The failure characteristics shown in Figures 4 and 5, Random Conditional Probability of Failure Curves , were first noted in the previously cited book, Reliability-Centered Maintenance. Follow-on studies in Sweden in , and by the U. Navy in , produced similar results. The basic difference between the failure patterns of complex and simple items has important implications for maintenance. Single-piece and simple items frequently demonstrate a direct relationship between reliability and age. This is particularly true where factors such as metal fatigue or mechanical wear are present or where the items are designed as consumables short or predictable life spans.
In these cases an age limit based on operating time or stress cycles may be effective in improving the overall reliability of the complex item of which they are a part.
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Complex items frequently demonstrate some infant mortality, after which their failure probability increases gradually or remains constant. A marked wear-out age is not common. In many cases scheduled overhaul increases the overall failure rate by introducing a high infant mortality rate into an otherwise stable system.