Condition based maintenance and condition monitoring pf curve thinking figure 2. These conditions can be any feature of equipment which indicates unstable behavior such as loud sound or high temperature. Condition based maintenance has been defined as maintenance actions based on actual condition objective evidence of need obtained from insitu, noninvasive tests, operating and condition measurement. Condition based maintenance cbm is a subdivision of preventive. Predictive maintenance techniques are designed to help determine the condition of inservice equipment in order to estimate when maintenance should be performed. This relatively new approach to maintenance uses data drawn during operations andor maintenance intervals to forecast the need for additional or future maintenance. Asset management is a systematic, lifecycle approach of operating, maintaining, upgrading, decommissioning and renewing assets and infrastructure costeffectively and to an acceptable standard. It has become a hot topic in recent years as it can have a significant impact on the operational performance and thus the profitability of an organization. Implementation strategies and tools for condition based. A few ways to help find root causes 315 the 5 whys 317. Maintenance management techniques have been through a major process of metamorphosis over recent years. The purpose of this thesis is to evaluate the possibility implementing a condition based of maintenance cbm system the military vehicle cv9035in.
Condition based maintenance cbm is an equipment maintenance procedure based on detecting the condition of the equipment in order to evaluate whether it will fail during some future period and. It is used to identify invalid sensor data that seem faulty due to zero readings, missing data, jump, noise, etc. Phm techniques for conditionbased maintenance based on. Time and conditionbased maintenance 299 introduction to oncondition maintenance 302 friction between maintenance and production 304 what if we were starting from scratch. Many of them are making the transition to a conditionbased maintenance strategy. It focuses on responding to the root causes of machine or material failure, and dealing with those issues after problems occur. Conditionbased maintenance cbm has the ability to tackle this challenge by estimating the remaining time until equipment failure based on equipment conditions. Condition based maintenance is a strategy for maintenance based in the diagnosis, avoiding systematic task decided for period of time or counters hours, km, etc. Conditionbased monitoring is an accepted feature of many industries. Based on the current condition, its main objective is to assess, whether the process needs maintenance tasks, and if a maintenance process is needed, determining when the maintenance actions be executed tran et al.
Conditionbased maintenance cbm is a maintenance strategy that monitors the actual condition of an asset to decide what maintenance needs to be done. Conditionbased maintenance cbm is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it is needed and at the most opportune times. Jun 23, 2017 condition based maintenance is a strategy for maintenance based in the diagnosis, avoiding systematic task decided for period of time or counters hours, km, etc. Early on a distinction is made between an extended condition based maintenance system and one of its constituentparts, trending, where the main focus of. An introduction to condition based maintenance using reliability assessment methods p. Pdm uses cbm systems to detect fault sources well in advance of failure, making maintenance a proactive process. Today, the maintenance progress has been provoked by the increase in complexity in manufacturing processes and variety of products, growing awareness of the impact of maintenance on the environment and safety of personnel, the profitability of the business and quality of products. Condition based maintenance cbm offers the promise of enhancing the effectiveness of maintenance programs in a way that no other single concept has ever matched. Condition based monitoring cbm is a type of predictive maintenance that involves using sensors to measure the status of an asset over time while it is in operation. An evaluation of condition based maintenance for a. Conditionbased maintenance cbm southwest research institute. Best practice strategies key to successful maintenance effort.
For example, most people change the oil in their vehicles every 3,000 to 5,000 miles traveled. Condition based maintenance allows preventive and corrective actions to be scheduled at the optimal time, thus reducing the total cost of ownership. Research, though, has shown that condition based maintenance has not been implemented on a wide basis. Rules for survey after abs construction part 7 in mid2002. Nevertheless, neither of the process tasks documents details such as usage.
An overview of methods and techniques samuel telford, muhammad ilyas mazhar and ian howard department of mechanical engineering, curtin university, perth wa 6102, australia abstract. Condition based maintenance cbm refers to a collection of activities, inspections, tests and procedures that are performed in response to the failure or destabilization of equipment, a machine or a material. Guide for survey based on preventative maintenance techniques. This differs from traditional management practices such as failurebased corrective maintenance or timebased preventive maintenance approaches.
Conditionbased maintenance cbm is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it. Pdf technical design of condition based maintenance system. A general ruleofthumb is to set the intervals for inspection somewhere midway of the pf interval. On condition based maintenance policy sciencedirect. The benefits anticipated using conditionbased maintenance over the current scheduled maintenance approach are. Six steps to conditionbased maintenance an exciting trend in the world of cmms is the increasing sophistication of conditionbased maintenance cbm features and functions vendors offer and maintenance professionals actually use. The pf curve figure 2 is an artists version of the fault progression of a defect. Conditionbased maintenance conditionbased maintenance cbm is a transition from a reactive to a proactive maintenance approach. Department of energys federal energy management program femp. This text attempts to present the fundamental justification for conditionbased maintenance together with enough analytic and practical guidance for its implementation. With the introduction in the 1960s of the first boeing jumbo jets questions were raised about the sense of continuing with maintenance requirements based on the traditional bathtub curve maintenance paradigm present at the time. Equipment failure probability curves showing the six time related patterns of failure. The data collected can be used to establish trends, predict failure, and calculate remaining life of an asset.
Condition based maintenance strategy for equipment failure. In condition based maintenance, critical item characteristics are monitored through, for example, vibration or temperature monitoring in order to gain early indications of an incipient failure. The corrective approach, also called unplanned or reactive maintenance veldman et al. This maintenance is performed after one or more indicators show that equipment is going to fail or that equipment performance is deteriorating. Condition based maintenance cbm is a maintenance strategy which, simply put, measures operational parameters in assets to determine a change in their condition, performing maintenance only when the need arises. Predictive maintenance is the complement of preventive maintenance. We develop and implement technologies that enable cbm, including data acquisition systems, management and tracking software, and condition monitoring. Condition based maintenance plus dod guidebook dau. Cbm can drastically reduce operating costs and increase the safety of assets requiring maintenance. In this study, we have addressed several aspects of cbm approach. Point f is the point at which the defect has created a functional failure.
Analysis of highly variant, temporal sparsely settled, unmarked data sets for performing conditionbased maintenance. A neural network approach to condition based maintenance. There are various kinds of techniques to be applied in data processing, diagnostics, and prognostics for implementing cbm as shown in table 2. A wellorchestrated predictive maintenance program will all but eliminate catastrophic equipment failures. Condition based maintenance cbm in the oil and gas. Condition based maintenance, or cbm, is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it is needed and at the most opportune times. Six steps to conditionbased maintenance plant services. Through the utilization of various nondestructive testing and measuring techniques, predictive maintenance determines equipment status before a breakdown occurs. An overview of timebased and conditionbased maintenance.
Perhaps we re finally turning a corner on the ageold firefighting mentality, replacing it with a more planned. The benefits anticipated using condition based maintenance over the current scheduled maintenance approach are. An extensible cbm architecture for naval fleet maintenance. Condition based maintenance in the manufacturing industry diva.
Conditionbased maintenance is the practice of conducting maintenance on a machine when the assets condition reaches a disruptive level. This differs from traditional management practices such as failure based corrective maintenance or time based preventive maintenance approaches. In particular, cbm is highly effective where safety and reliability is the paramount concern such. The enterprise trumpf machine tools is the global leader in the production of machine tools for sheet metal. Conditionbased maintenance allows preventive and corrective actions to be scheduled at the optimal time, thus reducing the total cost of ownership. Cbm can be further refined to rcm, reliability centered maintenance which is using rba, risk based analysis to give the priority to maintenance and replacement activities. Taking the first steps toward conditionbased maintenance utility maintenance managers are increasingly coming to realize that its wasteful to perform maintenance on a fixed schedule.
On conditionbased maintenance for machine components. In manufacturing, its application has been somewhat muted. An optimization method for condition based maintenance of. Condition based maintenance and condition monitoring. Maintenance actions are performed based only upon evidence of need. Again, using multiple monitoring points within the pf interval is even better and more advisable. Preventive maintenance is a part of what is called planned or proactive maintenance and performs maintenance on scheduled. Condition based maintenance condition based maintenance cbm is a transition from a reactive to a proactive maintenance approach. Point p is the point at which the defect enters the system and is detectable. The concept, quite correctly, is based on the belief that if equipment can be evaluated, and. Cbm, condition based maintenance and replaces the earlier tbm, time based maintenance or in worst case nma no maintenance at all. Condition based maintenance cbm has the ability to tackle this challenge by estimating the remaining time until equipment failure based on equipment conditions. Cbm dictates that maintenance should only be performed when certain indicators show signs of decreasing performance or upcoming failure.
Early on a distinction is made between an extended condition based maintenance system and one of its constituentparts, trending, where the main focus of this thesis lies. The equipment has sensors that communicate if its ok in realtime. According to kardec and lafraia 2002, maintenance indicators are. Condition based maintenance cbm is a maintenance philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it is needed and at the most opportune.
Establishing a condition based maintenance program. Nontimebased failures 297 infant mortality 298 chapter 10. Apply to maintenance engineer, process technician, chief engineer and more. As the machine communicates its condition, the data is saved within a computerized maintenance management system cmms in a way that is easily read by humans.
The primarily focus has been laid to highlight perspective view on the techniques which assist in the development of health prognosisbased or conditionbased maintenance tools and practices to. Pdf examples of condition based maintenance with the. This publication collects and analyses proven condition based maintenance strategies and techniques engineering and organizational in member states. Butcher 2000, defines the maintenance technology as cbm is a set of maintenance actions based on realtime or near. According to caesarendra, datadriven approach has the ability to transform highdimensional data into lower dimensional information. Condition based maintenance cbm in the oil and gas industry. The transition to a condition based maintenance program for army aviation requires first and foremost an accurate assessment of drive train mechanical health. The mission of femp is to facilitate the federal governments implementation of sound, cost. Best practice strategies key to successful maintenance effort w ith competition in manufacturing coming from many global regions, the challenge to remain profitable places greater and greater emphasis on those actions within the mill that can positively affect the bottom line. Conditionbased maintenance and machine diagnostics. The main work of the optimization decision making method for fleet cbm considering prognostics uncertainty includes the following steps.
You will recall that preventive maintenance is time based. Run to failure rtf, and conditionbased maintenance cbm techniques to in an. You can implement conditionbased maintenance gradually and to whatever level of automation is appropriate. Today, improvements in technology are making it easier to gather, store and analyze data for cbm. Condition based maintenance engineer jobs, employment. Jul 26, 2006 six steps to condition based maintenance an exciting trend in the world of cmms is the increasing sophistication of condition based maintenance cbm features and functions vendors offer and maintenance professionals actually use. In maintenance techniques, the use of objective condition. Conditionbased maintenance cbm is a methodology that combines predictive and preventive maintenance with realtime monitoring. This approach promises cost savings over routine or timebased preventive maintenance, because tasks are performed only when warranted. Jun 23, 2017 condition based maintenance cbm is a maintenance strategy which, simply put, measures operational parameters in assets to determine a change in their condition, performing maintenance only when the need arises. Conditionbased maintenance cbm refers to a collection of activities, inspections, tests and procedures that are performed in response to the failure or destabilization of equipment, a machine or a material. Taking the first steps toward conditionbased maintenance. An introduction to condition based maintenance using. This thesis is based on the following papers, appended in their original format at the back of.
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