Predictive Maintenance (PdM) aims to predict failures before they occur so that maintenance can be done at the right time. PdM uses data from machine sensors and intelligent technology to alert the maintenance team when a piece of equipment is at risk of failure. For example, a sensor can use vibration analysis to alert the maintenance team that equipment is at risk of failure, at which point it will be disconnected, inspected and repaired accordingly. Join more than 14,000 maintenance professionals who receive monthly CMMS tips, industry news and updates.
Performing corrective maintenance means that, when a problem is detected, the maintenance associated with the problem is carried out before the problem escalates. An example would be if a technician is conducting a planned inspection and, in the meantime, detects a problem, the technician will perform corrective maintenance, so that the problem does not cause a breakdown or other type of failure. Condition-based maintenance is carried out based on minimum and maximum indicators. This means that a job will be activated in the maintenance system, if, for example, the temperature exceeds the maximum value.
Therefore, the status of the machine will indicate when maintenance should be performed. When working with predictive maintenance, this is based on the condition of machines and equipment. This is done by monitoring the condition of the machines to predict when a possible breakdown will occur. Some maintenance systems can work with predictive maintenance and calculate trend curves, based on the data that is written to the system.
This trend shows when a job or task should be carried out in the future. Preventive maintenance aims to detect and fix problems before they occur. It is usually carried out in the form of regular inspections, which usually occur several times a year. The main benefit of preventive maintenance is that it can eliminate unplanned downtime, since the ideal is to detect problems before they occur.
Condition-based maintenance is sometimes considered a more advanced alternative to preventive maintenance. Instead of being inspected according to a schedule, machines and systems are carefully observed for changes that may indicate imminent failure. With condition-based maintenance, technicians observe system operation and identify variables that could affect operation, such as temperature, vibration speed, power, presence or absence of moisture, etc. Another strategy within condition-based maintenance is predictive maintenance.
Predictive maintenance refers to a specific type of condition-based maintenance in which systems are constantly observed through sensor devices. These devices connect to system components and provide constant, real-time data to the software. The software then interprets this data and warns service technicians that hazards are approaching. Predictive maintenance is generally considered to be the most advanced and intensive type of maintenance.
This is because there is a lot of data to interpret, and the sensor devices themselves need to be maintained and verified regularly. Reactive maintenance is commonly used to respond to a tenant's request to repair items in their units and preventive maintenance is used to regularly inspect and replace filters on essential assets, such as an HVAC machine. Until recently, when talking about predictive maintenance (PDM), this was essentially synonymous with condition-based maintenance. Therefore, in my opinion, planned maintenance is maintenance that has gone through the planning process and that has been properly prepared with all the steps of the work, labor, parts and tools identified and organized.
This is because this type of maintenance does not go through the scheduling process of full maintenance planning & because it is very urgent and is simply planned on the fly. Instead, download The Types of Maintenance Tool Kit and learn what type of maintenance to use and when. This type of maintenance is described as planned because it is based on well-established maintenance schedules and concrete data. Regardless of the decision you make, you need to provide maintenance teams with maintenance management software to ensure proper supervision of interventions, as well as smooth communication between technicians and other professionals.
An efficient and effective preventive maintenance program will have a combination of all of these different types of maintenance. To be successful in the field of building maintenance, it is useful to understand the different types of maintenance methods that exist and how and when they are used. In short, reactive maintenance often means more downtime and higher maintenance costs when not used strategically. Unfortunately, books rarely specify this distinction, leading to mixing oranges and apples under the same general term of “maintenance tasks”, which is not precise enough to correctly describe the other maintenance concepts within preventive maintenance.
But, in many people's minds, fault maintenance is urgent maintenance, maintenance that needs to be done right now. Time-based maintenance is basically a type of maintenance that is performed at regular intervals while the equipment continues to operate in order to prevent failures or reduce the likelihood of failure. Preventive maintenance is commonly used to maintain the assets of a facility, such as HVAC machines, and reactive maintenance is primarily used to keep areas of a facility in good operating condition, such as painting walls. .