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autonomous maintenance
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Maintenance performed by the machine operator rather than the maintenance staff. Autonomous maintenance includes tasks such as lubricating and tightening machine parts.
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baseline readings
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Measurements such as machine temperature or vibration taken while a machine is in working order. One of the first tasks when beginning a PdM program.
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computerized maintenance management system
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CMMS. Computer software used to plan and schedule maintenance activities.
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condition-based maintenance
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CBM. A maintenance technique closely related to PdM that involves monitoring machine condition and predicting machine failure. Many CBM systems are controlled by computers.
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consultant
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An expert hired by a company to provide advice and recommendations. A company may hire a maintenance consultant to help select a maintenance approach.
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downtime
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Unproductive blocks of time during which machine operations cease, often due to mechanical problems.
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lean manufacturing
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An approach to manufacturing that seeks to improve product quality and productivity, reduce costs, and eliminate waste. TPM is used in lean manufacturing.
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lubricant
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A substance used to reduce friction between two surfaces in relative motion. Oil and grease are common industrial lubricants.
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lubrication
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The act of applying lubricant to machines. Lubrication is a common task in preventive maintenance.
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maintenance
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The necessary and basic support and repair of machines. Maintenance includes tasks such as lubricating, adjusting, and replacing parts.
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maintenance planner
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A person who schedules and coordinates maintenance activities. Companies with large maintenance departments often hire maintenance planners.
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planned downtime
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A period of scheduled downtime for machine maintenance. Planned downtime is preferable to unplanned downtime caused by machine failure.
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predictive maintenance
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PdM. A maintenance approach that involves testing and monitoring machines in order to predict machine failures.
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preventive maintenance
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PM. Maintenance performed while a machine is in working order to keep it from breaking down.
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reactive maintenance
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RM. Maintenance performed only after a machine fails or experiences problems.
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reliability-centered maintenance
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RCM. A maintenance approach that prioritizes some machines over others to increase reliability and optimize financial resources.
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run-to-failure
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A maintenance policy that allows a machine to run until it breaks down, at which point reactive maintenance may be performed.
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total productive maintenance
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TPM. A manufacturing improvement method that increases production and reduces waste through continuous attention to the condition of machines and processes.
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unplanned downtime
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A period of unscheduled downtime, often due to machine failure.
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vibration analysis
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A PdM technique that uses instruments to monitor and analyze machine vibration to determine if the machine is working properly. Vibration analysis is of the most common techniques used in PdM.
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waste
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Any thing or process that does not add value to a product. The goal of lean manufacturing is to eliminate waste.
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