This differs from traditional management practices such as failurebased corrective maintenance or timebased preventive maintenance approaches. There are various kinds of techniques to be applied in data processing, diagnostics, and prognostics for implementing cbm as shown in table 2. Conditionbased monitoring is an accepted feature of many industries. The concept, quite correctly, is based on the belief that if equipment can be evaluated, and. Condition based maintenance condition based maintenance cbm is a transition from a reactive to a proactive maintenance approach.
On condition based maintenance policy sciencedirect. Phm techniques for conditionbased maintenance based on. The equipment has sensors that communicate if its ok in realtime. 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. The corrective approach, also called unplanned or reactive maintenance veldman et al.
This approach promises cost savings over routine or timebased preventive maintenance, because tasks are performed only when warranted. Condition based maintenance cbm in the oil and gas industry. Preventive maintenance is a part of what is called planned or proactive maintenance and performs maintenance on scheduled. 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.
Rules for survey after abs construction part 7 in mid2002. Nontimebased failures 297 infant mortality 298 chapter 10. Implementation strategies and tools for condition based. The pf curve figure 2 is an artists version of the fault progression of a defect. 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.
This maintenance is performed after one or more indicators show that equipment is going to fail or that equipment performance is deteriorating. 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. Maintenance actions are performed based only upon evidence of need. Early on a distinction is made between an extended condition based maintenance system and one of its constituentparts, trending, where the main focus of. Establishing a condition based maintenance program. An evaluation of condition based maintenance for a. This text attempts to present the fundamental justification for conditionbased maintenance together with enough analytic and practical guidance for its implementation. Condition based maintenance plus dod guidebook dau. Point f is the point at which the defect has created a functional failure. 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. Point p is the point at which the defect enters the system and is detectable.
An introduction to condition based maintenance using. Pdf examples of condition based maintenance with the. 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. Conditionbased maintenance is the practice of conducting maintenance on a machine when the assets condition reaches a disruptive level. Conditionbased maintenance allows preventive and corrective actions to be scheduled at the optimal time, thus reducing the total cost of ownership. Cbm, condition based maintenance and replaces the earlier tbm, time based maintenance or in worst case nma no maintenance at all. Best practice strategies key to successful maintenance effort. A neural network approach to condition based maintenance. The enterprise trumpf machine tools is the global leader in the production of machine tools for sheet metal.
This thesis is based on the following papers, appended in their original format at the back of. An extensible cbm architecture for naval fleet maintenance. A general ruleofthumb is to set the intervals for inspection somewhere midway of the pf interval. Condition based maintenance cbm is a subdivision of preventive. Conditionbased maintenance cbm is a maintenance strategy that monitors the actual condition of an asset to decide what maintenance needs to be done. 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 philosophy used by industry to actively manage the health condition of assets in order to perform maintenance only when it. Time and conditionbased maintenance 299 introduction to oncondition maintenance 302 friction between maintenance and production 304 what if we were starting from scratch. A wellorchestrated predictive maintenance program will all but eliminate catastrophic equipment failures. Condition based maintenance and condition monitoring. Apply to maintenance engineer, process technician, chief engineer and more. Through the utilization of various nondestructive testing and measuring techniques, predictive maintenance determines equipment status before a breakdown occurs.
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. 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. Guide for survey based on preventative maintenance techniques. The benefits anticipated using conditionbased maintenance over the current scheduled maintenance approach are. Research, though, has shown that condition based maintenance has not been implemented on a wide basis. 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. The purpose of this thesis is to evaluate the possibility implementing a condition based of maintenance cbm system the military vehicle cv9035in. Conditionbased maintenance conditionbased maintenance cbm is a transition from a reactive to a proactive maintenance approach. Offline since the early 1990s, major interest in socalled online monitoring has started to appear in the industry. Taking the first steps toward conditionbased maintenance.
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. You can implement conditionbased maintenance gradually and to whatever level of automation is appropriate. Condition based maintenance cbm in the oil and gas. It is used to identify invalid sensor data that seem faulty due to zero readings, missing data, jump, noise, etc. 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. Or at least, the monitoring time must be shorter than the span of the pf interval. A few ways to help find root causes 315 the 5 whys 317.
Condition based maintenance and condition monitoring pf curve thinking figure 2. Condition based maintenance cbm has the ability to tackle this challenge by estimating the remaining time until equipment failure based on equipment conditions. The benefits anticipated using condition based maintenance over the current scheduled maintenance approach are. Conditionbased maintenance cbm is a methodology that combines predictive and preventive maintenance with realtime monitoring. 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. The main work of the optimization decision making method for fleet cbm considering prognostics uncertainty includes the following steps. 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. 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. These conditions can be any feature of equipment which indicates unstable behavior such as loud sound or high temperature. On conditionbased maintenance for machine components. Butcher 2000, defines the maintenance technology as cbm is a set of maintenance actions based on realtime or near.
An introduction to condition based maintenance using reliability assessment methods p. Run to failure rtf, and conditionbased maintenance cbm techniques to in an. We develop and implement technologies that enable cbm, including data acquisition systems, management and tracking software, and condition monitoring. Condition based maintenance engineer jobs, employment. 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. Condition based maintenance in the manufacturing industry diva. In maintenance techniques, the use of objective condition. Analysis of highly variant, temporal sparsely settled, unmarked data sets for performing conditionbased maintenance.
Six steps to conditionbased maintenance plant services. 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. The data collected can be used to establish trends, predict failure, and calculate remaining life of an asset. According to kardec and lafraia 2002, maintenance indicators are. Nevertheless, neither of the process tasks documents details such as usage. Today, improvements in technology are making it easier to gather, store and analyze data for cbm. 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. Predictive maintenance is the complement of preventive maintenance. The transition to a condition based maintenance program for army aviation requires first and foremost an accurate assessment of drive train mechanical health. This relatively new approach to maintenance uses data drawn during operations andor maintenance intervals to forecast the need for additional or future maintenance. 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. The mission of femp is to facilitate the federal governments implementation of sound, cost. Condition based maintenance 1996 page 3 of 11 online vs. An overview of timebased and conditionbased maintenance.
Predictive maintenance techniques are designed to help determine the condition of inservice equipment in order to estimate when maintenance should be performed. Cbm can drastically reduce operating costs and increase the safety of assets requiring maintenance. 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. You will recall that preventive maintenance is time based. 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. This publication collects and analyses proven condition based maintenance strategies and techniques engineering and organizational in member states. Conditionbased maintenance cbm southwest research institute. In this study, we have addressed several aspects of cbm approach. An optimization method for condition based maintenance of. It focuses on responding to the root causes of machine or material failure, and dealing with those issues after problems occur. Equipment failure probability curves showing the six time related patterns of failure. According to caesarendra, datadriven approach has the ability to transform highdimensional data into lower dimensional information.
Conditionbased maintenance cbm has the ability to tackle this challenge by estimating the remaining time until equipment failure based on equipment conditions. Department of energys federal energy management program femp. Pdf technical design of condition based maintenance system. Conditionbased maintenance and machine diagnostics. Condition based maintenance allows preventive and corrective actions to be scheduled at the optimal time, thus reducing the total cost of ownership. Maintenance management techniques have been through a major process of metamorphosis over recent years. In particular, cbm is highly effective where safety and reliability is the paramount concern such. 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. Cbm dictates that maintenance should only be performed when certain indicators show signs of decreasing performance or upcoming failure.
Asset management is a systematic, lifecycle approach of operating, maintaining, upgrading, decommissioning and renewing assets and infrastructure costeffectively and to an acceptable standard. In manufacturing, its application has been somewhat muted. Condition based maintenance strategy for equipment failure. 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. 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. 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. 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.
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