Predictive maintenance (PdM) techniques help determine the condition of in-service equipment in order to predict when maintenance should be performed. This approach offers cost savings over routine or time-based preventive maintenance, because tasks are performed only when warranted.
The main value of Predicted Maintenance is to allow convenient scheduling of corrective maintenance, and to prevent unexpected equipment failures. The key is "the right information in the right time". By knowing which equipment that needs maintenance, the maintenance work can be better planned (spare parts, people etc.) and what would had been "unplanned stops" are transformed to shorter and fewer "planned stops" thus increasing equipment availability. By using tools, specialized equipment, resources, and planning other values are realized such as increased equipment life time, increased plant safety, fewer accidents with negative impact on environment, and optimized spare parts handling, etc.
PdM, or condition-based maintenance, attempts to evaluate the condition of equipment by performing periodic or continuous equipment condition monitoring. The ultimate goal of PdM is to perform maintenance at a scheduled point in time when the maintenance activity is most cost-effective and before the equipment loses performance within a threshold. This is in contrast to time- and/or operation count-based maintenance, where a piece of equipment gets maintained whether it needs it or not. Time-based maintenance is labor intensive, ineffective in identifying problems that develop between scheduled inspections, and is not cost-effective.
The "predictive" component of predictive maintenance stems from the goal of predicting the future trend of the equipment's condition. This approach uses principles of statistical process control and the use of tools to determine at what point in the future maintenance activities will be appropriate.
Most PdM inspections are performed while equipment is in service, thereby minimizing disruption of normal system operations. In order to increase the safety aspects of real-time in service inspections we have identified tools to aid in the PdM inspection process. The tools and resources are found on this site. Adoption of PdM can result in substantial cost savings and higher system reliability.
Reliability-centered maintenance, or RCM, emphasizes the use of predictive maintenance (PdM) techniques in addition to traditional preventive measures. When properly implemented, RCM provides companies with a tool for achieving lowest asset Net Present Costs (NPC) for a given level of performance and risk.
One area that many times is overlooked is how to, in an efficient way, gather and process the PdM information and how to find the resources and specialist capable of assisting organizations with this process… PdM Tools Parent Company CTS inc. can assist you with this process…