Five strategies to achieve worldclass preventive maintenance. A complete guide to condition based maintenance cbm. The main goal behind pm is for the equipment to make it from one planned service to the next planned service without any failures caused by fatigue, neglect, or normal wear preventable items, which planned maintenance and condition based maintenance help to achieve by replacing worn components before they actually fail. Maintenance policies i time based maintenance tbm i easy to implement, no condition monitoring needed. The goal of this approach is to maintain equipment in a healthy condition. A time based maintenance tbm strategy featuring predefined intervals rooted in empirical feedback, where components are replaced after a specified period of use, has for many years been practised as the usual maintenance strategy in electricity supply networks. Maintenance strategies to reduce downtime due to machine. Development and implementation of preventivemaintenance. Doing so will help you guarantee that your business is one thats capable of reaching success in the future. The time based maintenance tbm strategy that we adopt is the agebased main.
Goal based this characteristic offers maintenance strategy a topdown approach. Time based maintenance, failure finding maintenance, risk based maintenance, condition based maintenance and predictive maintenance. Timebased maintenance tbm forms an underlying principle that applies to all four maintenance strategies. A maintenance strategy that is based on measuring the condition of assets to assess whether they will fail during some future period, and then taking appropriate action to avoid the consequences of that failure. Sap maintenance plan tutorial free sap pm training. A deterioration model for establishing an optimal mix of time. The final improvement strategy was the incorporation of information technology. Smarter mro 5 strategies for increasing speed, improving. Conditionbased maintenance cbm explained reliable plant. Periodic maintenance time based maintenance consists of periodically inspecting, servicing and cleaning equipment and replacing parts to prevent sudden failure and process problems predictive maintenance this is a method in which the service life of important part is predicted based on inspection or diagnosis, in order to use the parts to the. Deciding on a, suitable approach or strategy is no trivial task. Datadriven approaches use historic data and machine learning. Speed is one major advantage that cmms have compared to manual systems.
Although preventive maintenance strategy of equipment can be. Handbook of maintenance management and engineering. This approach generally produces satisfactory results. Condition based maintenance cbm is a maintenance strategy that monitors the real time condition of an asset to determine what maintenance needs to be performed. Advantages increased component operational lifeavailability.
Condition based maintenance cbm is a maintenance strategy that monitors the real time condition of an asset to determine what. For a long time, this characteristic of simplicity was real. To represent complex maintenance cycles, you can create a strategy plan based on a time based maintenance strategy. The terms condition based maintenance, oncondition maintenance, and predictive maintenance are often used interchangeably. Seven steps to maintenance strategy maintenance and engineering. Implementation strategies and tools for condition based. Time based maintenance tbm and condition based maintenance cbm for the enclosure system david albrice1, matthew branch1 abstract buildings comprise hundreds of assets, such as roofs and boilers, each of which has different durability expectations and therefore requires a corresponding maintenance strategy to sustain their.
If youve found this article helpful and would like to get your own pdf copy of the article. The mostsuccessful leaders learn to focus on the opportunities that present the greatest potential return on their. Apr 14, 2009 chan et al 2001 split this into five types of maintenance strategy, including time based, performance based, breakdown based, renovation based and integration based. Preventive maintenance principles mit opencourseware. In effect, its a reservation system that dedicates capacity at a specific time in the week. Request pdf on aug 1, 2012, rosmaini ahmad and others published an. Keeping this in mind, professionals can use the right tools with the right frequency without spending too much time and efforts.
Teams who follow a costminimization strategy reactive maintenance policies are able to keep costs low for a uptime falling and costs rising. Teams who follow a preventive maintenance strategy initially find higher costs and reduced uptime as equipment is taken offline for planned maintenance. Cbm is increasingly recognized as the most efficient strategy. This maintenance strategy uses sensors to monitor key param. This is effectively basing the oil change needs on equipment. The timebased maintenance tbm strategy that we adopt is the agebased main. Industries are with a number of faced available maintenance theories, models, and frameworks. Condition based maintenance in the manufacturing industry. There are 9 types of maintenance split between preventive maintenance and corrective maintenance. One that delivers high quality output, on time, every time. Pdf the influence of practical factors on the benefits of condition. Aug 01, 2012 the comprehensive based technique also known as maintenance concept development, which can be defined as a set of various maintenance interventions experience based, time based, condition based, etc.
Preventive and predictive maintenance 700zb00102 46 11. This master thesis should serve as a basis for developing their strategy which. How to choose the maintenance strategy that best suits your. The pros and cons of different maintenance strategies. It relies on the reliability leaders ability to recognize that time and money are limited resources.
However, because tbm may be performed whether it is needed or not, it does not always strike a balance between risk and reward. With around 80% of equipment failures being totally unpredictable based only on the equipment age, you must have a condition based maintenance strategy and predictive maintenance program to deal with them. Time based maintenance is performed on a calendar schedule. Mar 29, 1999 you will recall that preventive maintenance is time based. By organizing maintenance goals around corporate business strategy, maintenance becomes a corporate culture instead of one groups responsibility. Even today, it still appears to many sme managers or maintenance managers as the simplest to implement. This is a cost we could minimize under a different maintenance strategy. I condition based maintenance cbm i condition monitoring required, more appropriate scheduling. Predictive maintenance strategy for building operations. Predictive maintenance pdm is a strategy that includes feedback of the instantaneous condition of the machine and detects degradation before a fault becomes critical 7. Develop powerful predicative maintenance strategy to build a.
Time slicing for external service providers and internal operations such as cleaning and heat treatment, time slicing helped overcome long queues. Corrective maintenance has long been the main maintenance strategy used to maintain industrial machinery. If what i consider to be condition based maintenance you call predictive. Also called clockbased maintenance, or condition independent maintenance or. Reliabilitycentered maintenance rcm is a concept of maintenance planning to ensure that systems continue to do what their user require in their present operating context. The remaining 20% usage and time based repetitive failures are addressed by doing preventive maintenance and planned replacement maintenance. Successful implementation of rcm will lead to increase in cost effectiveness, reliability, machine uptime, and a greater understanding of the level of risk that the. Preventive maintenance is done before a failure occurs and consists of maintenance types like. This means that it can be used with both predictive maintenance and preventative maintenance. An analysis of maintenance strategies and development of a. Predictive maintenance, also known as conditionbased maintenance cbm is. Maintenance strategy an overview sciencedirect topics. A comparison of timebased maintenance and conditionbased. The concept behind this approach is that all equipments need time based overhauling to ensure safety and reliability.
Selected service and part replacements are scheduled based on a time interval for each device whether it needs it or not. To ensure that you have a viable maintenance strategy, first examine the scheduled maintenance activities that are currently being performed. Pdf handbook of maintenance management and engineering. Effective maintenance strategy is key to success for. An overview of timebased and conditionbased maintenance. This means that time is the maintenance trigger for this type of maintenance. This approach is based on the firm belief that the costs sustained for downtime and repair in case of fault are lower than the investment required for a maintenance program. In a time based maintenance strategy, assets are periodically inspected, serviced and cleaned, with parts replaced in an effort to prevent sudden failure. Strategies and concepts such as condition based maintenance cbm have thus evolved to support this ideal outcome. Time based maintenance tbm, also called periodic maintenance, refers to routine maintenance tasks performed on an asset at fixed time intervals, regardless of its condition. Rcm implementation requires the collection and analysis of historical failure and maintenance data to determine current condition of the equipments. Maintenance has during a long period of time mostly been associated with costs. The preventive maintenance philosophy is also known as time based or planned maintenance. As a result of this study, the company could easily formulate a maintenance strategy b y using a simple process based on the t ools that they ha ve already used.
Conditionbased maintenance strategy for production systems. Logbased predictive maintenance in discrete parts manufacturing. Level1 manual the most rudimentary of manuals, which contains a package of. If the answer is yes but criticality does not justify it, then planned preventative or breakdown maintenance will be applied. Sep 26, 2019 multi counter plan is the combination of a time based and performance based maintenance plan. A better approach schneider electric white paper revision 0 page 6 reason, it also is less expensive over any significant length of time, because there are fewer emergencies and less unplanned downtime. Different counters are created for this type of sap maintenance plan. The technical meaning of maintenance involves functional checks, servicing, repairing or. It is not derived from maintenance strategy, which means you can create a multi counter plan without a maintenance strategy. Make sure there is an appropriate balance of conditional inspections, preemptive replacements, monitoring technology applications, andor runtofailure strategies based on observed asset behavior. Pdf maintenance strategy selection and its impact on. For example, most people change the oil in their vehicles every 3,000 to 5,000 miles traveled. Aug 25, 2020 the simplest maintenance strategy to adopt. It will not, however, be the most costeffec tive option in all cases.
A maintenance plan for a piece of equipment is put together that needs to be performed. For example, a typical schedulebased maintenance strategy demands. This strategy leads to high levels of machine downtime production loss and maintenance repair or replacement costs due to sudden failure tsang, 1995. Actions performed on a detect, preclude, or mitigate degradation of a component or system with the aim of controlling degradation to an acceptable level. Strategies and concepts such as condition based maintenance cbm have. For more information, see single cycle plan and strategy plan.
The principle of employing a zerosum maintenance strategy is quite simple. Maintenance activities include partial or complete overhauls at specified periods, oil changes, lubrication, minor adjustments, and so on. You will learn to determine the time of day you have the most energy for accomplishing important tasks, as well as what your life goals are and what steps you need to take to accomplish them. Is a programmeprocess manual that describes goals, roles, responsibilities, and.
Reliability based maintenance strategy selection in. An analysis of maintenance strategies and development of a model. Furthermore, tse 2002 is of the opinion that most of the maintenance practices are failuredriven, time based, condition based, reliabilitycentered and predictive. Tbm maintenance is planned maintenance, as it must be scheduled in advance.
A maintenance strategy contains general scheduling information, and you can assign a maintenance strategy to many maintenance plans and maintenance task lists. Multiple counter plan a multiple counter plan can be created without a maintenance strategy and is used for performance based maintenance. Cbm is a set of maintenance actions based on the real time or near real time assessment of equipment conditions. Timebased maintenance lends itself perfectly to service agreements as the scope of the tasks and their intervals are clearly defined and can be appended to the agreement or referenced to applicable standards. Fcs7101 the successful persons guide to time management good time. I maintenance is performed when the unit reaches age t. This strategy may be costeffective until catastrophic faults occur. As a type of preventive maintenance pm, the goal of time based maintenance is to prevent failures before they happen and improve asset performance. Timebased maintenance tbm is maintenance performed on equipment based on a calendar schedule. Predictive maintenance is a condition based process, forecasting when an equipment failure can occur and warning the maintenance manager. Traditional maintenance approach is based on two basic tasks corrective actions and time based preventive actions.
A beginningstart ppm practices immediately if you expect to establish an efficient operating system. Time based maintenance can never effectively manage nonage related failure modes and therefore should only form a small part of your overall maintenance program as 70% of the failure modes in your plant are not age related refer to the article 9 principles of modern maintenance. Pdf an overview of timebased and conditionbased maintenance. An overview of timebased and conditionbased maintenance in. Overview of maintenance strategy, acceptable maintenance. A conditionbased maintenance strategy is proposed for such systems. Condition based maintenance of the twobeam laser welding in high volume. By contrast, conditionbased maintenance is not directly based on equipment age.
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