Proactive Maintenance

Proactive maintenance provides a logical culmination to the other types of maintenance described above. It improves maintenance through better design, installation, maintenance procedures, workmanship and scheduling. 

Maintaining a feedback loop from maintenance to design engineers, in an attempt to ensure that design mistakes made in the past are not repeated in future designs. 

Viewing maintenance and supporting functions from a life-cycle perspective. This perspective will often show that reducing maintenance activity to save money in the short term often costs more in the long term. 

Constantly re-evaluating established maintenance procedures in an effort to improve them and ensure that they are being applied in the proper mix. 

Proactive maintenance uses the following basic techniques to extend machinery life  

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It is ironic the piping spool was being replaced to avoid the possibility of a leak and yet the proactive maintenance attempt resulted in the escape of 670 tons of a flashing flammable material. 

Particles, moisture, soot, heat, air, glycol, fuel, detergents, and process fluids are all contaminants commonly found in industrial lubricants and hydraulic fluids. However, particle contamination is widely recognized as the most destructive contaminant to the oil and machine. This is the reason why the particle counter is the most widely used instrument in oil analysis today. The central strategy to its success in reducing maintenance costs and increasing machine reliability is proactive maintenance. 

While the benefits of detecting abnormal machine wear or an aging lubricant condition are important and frequently achieved with oil analysis programs, they are of low importance when compared to the more rewarding objective of failure avoidance. This is achieved by treating the causes of failure, not just the symptoms. Also, it is the foundation of the popular practice known as proactive maintenance. 

Whenever a proactive maintenance strategy is applied, three steps are necessary to ensure that its benefits are achieved. Since proactive maintenance, by definition, involves continuous monitoring and controlling of machine failure root causes, the first step is simply to set a target, or a standard, associated with each root cause. In oil analysis, the most important root causes relate to fluid contamination (particles, moisture, heat, coolant, etc.). 

Contamination Control Even the best lubricants and application methods can be severely compromised by invasion of harmful contaminants. Keeping contaminants in check using the proactive maintenance strategy is essential to effective lubrication. 

The EDS testing clearly showed that successful operation of the SCWO system requires an aggressive, proactive maintenance program to replace (1) the thermocouple well after approximately 60 hours of operation and (2) the titanium liner after approximately 130 hours of operation. 

Percent planned work Measured by either the percent work orders planned or percent actual craft hours on planned work. This metric evaluates the overall effectiveness of the planning process as well as the impact of aU maintenance best practices to promote a proactive maintenance repair strategy, i.e., PM, PdM, reliability improvement actions, effective MRO support, etc. 

Military convoys with smart tags (RFIDs with independent power sources) have been used to facilitate information gathering in the field as deployment changes and conditions unfold. Continuous monitoring of engine conditions or blades in aircraft enable proactive maintenance, thus enabling quick aircraft turnaround. 

Preventative maintenance Proactive maintenance Use-based maintenance... 

The use of risk informed maintenance strategies should be considered, to provide a reasonable balance in the mixture of corrective, preventive and predictive maintenance (see paras 2.2-2.4) and to facilitate proactive maintenance rather than exclusively reactive maintenance. 

Maintenance strategy Develop a plan to introduce a proactive maintenance model with Preventive and Planned Maintenance at the top of planned priorities. This will provide more time for performing maintenance utilizing the Best Maintenance Repair Practices. ... 

As in any proactive maintenance organiTation you must perform Root Cause Failure Analysis in order to eliminate liiture component failures. Most maintenance problems or failures will repeat themselves without someone identilying what caused the failure and proactively eliminating it. A preferred method is to inspect and analyze all component failures. Identify the following ... 

To summarize, maintenance of a hydraulic system is the first line of defense to prevent component failure and thus improve equipment reliability. As discussed earlier, discipline is the key to the success of any proactive maintenance program. 

Virgili A, Minghetti S, Borghi A, Corazza M. Proactive maintenance therapy with a topical corticosteroid for vulvar Mchen sclerosus preliminary results of a randomized study. Br J Derm 2013 168(6) 1316-24. 

Monitor manufacturer recalls through www.nhtsa.dot.gov and consult with manufacturer service representatives to keep current with service bulletins for proactive maintenance. 

Bakor, G. R. Shipboard CHI Analysis A Proactive Maintenance Approach. Proceedings of the 47th Meeting of the Mechanical Failures Prevention Group, 1993, 209-220. 

The major difference in proactive maintenance compared to other maintenance programmes is that it does not just treat the symptom but determines the root causes of repeated failures and addresses them. 

Furthermore, the CMS can be mounted in remote areas to monitor the material as it corrodes, thereby eliminating the need for periodic inspection. Life cycle costs for aircraft, ships, submarines, and electronics systems can be reduced if a proactive maintenance requirement is implemented. This is possible through utilization of real time corrosion condition data generated from such in situ corrosion sensors. A proactive maintenance inspection will permit the tailoring of maintenance scheduling as a Unction of specific operational environment and damage, in contrast to the rigidly scheduled maintenance inspections that currently drive systems maintenance. 

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