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Quality & Improvement

Preventive Maintenance

Also known as: Preventative Maintenance, PM, Planned Preventive Maintenance, PPM

Scheduled, time- or usage-based maintenance performed on a fixed interval to reduce the likelihood of failure, as opposed to reactive maintenance done only after a breakdown.

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Preventive maintenance is maintenance carried out on a planned schedule to reduce the probability of failure or degradation of equipment, rather than waiting for a breakdown. The U.S. Department of Energy's Federal Energy Management Program defines it as 'actions performed on a time- or machine-run-based schedule that detect, preclude, or mitigate degradation of a component or system,' with the goal of sustaining or extending the equipment's useful life. [1] The European maintenance terminology standard EN 13306 frames preventive maintenance as maintenance carried out at predetermined intervals or according to prescribed criteria, intended to reduce the probability of failure or degradation. [2] It contrasts with reactive (corrective) maintenance, the 'run it till it breaks' mode in which no action is taken until equipment fails. [1] It also differs from predictive maintenance, an advanced approach that bases the maintenance need on the actual measured condition of the machine rather than on a fixed calendar or runtime trigger. [1] [3] In a Total Productive Maintenance (TPM) program, preventive and routine maintenance tasks are often shared with the operators who run the equipment, who monitor its condition as part of autonomous maintenance. [4] Because the same task must be performed the same way every cycle, preventive maintenance depends on standardized, repeatable procedures and on records that prove each task was actually completed. [1]

Key characteristics

  • Triggered by a time- or usage-based schedule (calendar interval or run hours), not by an observed failure. [1] [3]
  • Performed while the equipment is still functioning, with the aim of reducing the probability of failure. [2] [3]
  • Distinct from predictive maintenance, which bases the task on the asset's actual measured condition rather than a fixed interval. [1] [3]
  • Costs more upfront than reactive maintenance but generally lowers long-term cost and unplanned downtime. [5]
  • In a TPM program, routine preventive tasks are often shared with the operators who run the equipment. [4]
  • Relies on standardized, repeatable procedures and completion records to be effective. [1]

Example

A monthly preventive maintenance task on a packaging line

A packaging line has a recurring monthly preventive maintenance task: inspect and lubricate the conveyor drive, change the air filter, and check belt tension. None of these jobs are triggered by a fault. They are scheduled on a fixed interval so degradation is caught and mitigated before it causes an unplanned stop. [1] This is the opposite of reactive maintenance, where the same line would simply run until the bearing seized and the line went down mid-shift. [1] If the team later fits a vibration sensor and lets measured bearing condition decide when to act, the task shifts from preventive (interval-based) to predictive (condition-based). [3] For the preventive task to deliver, every technician has to perform the same steps the same way each month, and the shop needs a record showing the task was actually done. [1]

Comparison

Preventive vs reactive maintenance

Aspect Preventive (planned) Reactive (corrective)
Trigger Scheduled time or usage interval After a failure has occurred
Planning Requires scheduling and procedures Minimal planning
Downtime Scheduled and minimal Unplanned and often extended
Cost profile Higher upfront, lower long term Lower upfront, higher long term
Equipment life Extended toward design life Premature wear and failures

How SOPX handles this

Preventive maintenance only works when every technician performs the same task the same way and you can prove it was done. SOPX captures each PM task as a visual, step-by-step SOP: film the senior technician doing the job once, or import the OEM manual PDF, and the AI structures it into clear steps with a clip or annotated image per step. At the machine, a technician opens the latest version by QR code in full screen mode and follows one step at a time, in 50+ languages, so a procedure written once is usable by a multilingual crew. Every procedure is versioned, so when a PM method changes you update it once and the current version is live at the station. In Run mode, each step carries a checklist item with sign-off, so a completed run is proof the PM was actually performed, not just scheduled. SOPX documents and proves the procedure, which is the part most teams cannot show an auditor. It is not a CMMS, work-order, scheduling, or asset-management system, so it sits alongside those tools rather than replacing them. See how teams use it for maintenance procedures and across manufacturing.

Related use case: Maintenance Procedures →

Frequently asked questions

What is the difference between preventive and reactive maintenance?
Preventive maintenance is performed on a planned time- or usage-based schedule to reduce the chance of failure, while reactive (corrective) maintenance is the 'run it till it breaks' approach where no action is taken until equipment fails. [1] Reactive maintenance needs little planning but tends to cause unplanned, extended downtime and higher long-term cost. Preventive maintenance costs more upfront but generally lowers long-term cost and keeps downtime scheduled and minimal. [5]
What is the difference between preventive and predictive maintenance?
Both are proactive, but the trigger differs. Preventive maintenance is time- or runtime-based: you act at a fixed interval regardless of the asset's exact condition. [1] [3] Predictive maintenance bases the maintenance need on the actual measured condition of the machine, for example using sensors or analysis to act only when the data shows the asset is heading toward failure. [1] [3] Predictive maintenance can avoid both premature and overdue tasks, but preventive maintenance is simpler to run and does not require condition-monitoring instrumentation.
How does preventive maintenance relate to TPM?
Total Productive Maintenance (TPM) is a broader program in which preventive and routine maintenance responsibilities are shared with the operators who run the equipment. [4] Under TPM's autonomous maintenance pillar, operators monitor the condition of their own equipment and perform basic preventive tasks such as cleaning, inspection, and lubrication, rather than leaving all maintenance to a separate department. [4] Preventive maintenance is therefore one of the building blocks that a TPM program standardizes and pushes out to the floor.
Why do preventive maintenance procedures need to be standardized?
A preventive maintenance task only delivers its benefit if it is performed correctly and consistently every interval. [1] If two technicians lubricate, inspect, or replace parts differently, the interval-based logic breaks down and failures the program was meant to prevent still occur. Standardized procedures define the exact steps, and completion records provide the evidence that each scheduled task was actually performed, which is what supports the cost and reliability gains attributed to preventive maintenance. [1] [5]
Is preventive maintenance the same as a CMMS?
No. A CMMS (computerized maintenance management system) schedules preventive maintenance, generates work orders, and tracks assets and parts. [1] Preventive maintenance is the strategy and the actual hands-on tasks, not the software. A CMMS tells you a PM is due and records that a work order was closed, but it does not on its own define how the task should be performed step by step, which is the role of a standardized procedure.

Sources

Statements above draw on the references below. Numbers in the text link to the matching entry.

  1. [1]
    Operations & Maintenance Best Practices Guide, Release 3.0 (Chapter 5: Types of Maintenance Programs)
    U.S. Department of Energy, Federal Energy Management Program (FEMP) · Accessed 2026-06-21
  2. [2]
    BS EN 13306:2017 Maintenance. Maintenance terminology
    BSI (British Standards Institution) · Accessed 2026-06-21
  3. [3]
    The 9 Types of Maintenance: How to Choose the Right Strategy
    Reliability Academy · Accessed 2026-06-21
  4. [4]
    What is Total Productive Maintenance?
    Reliabilityweb · Accessed 2026-06-21
  5. [5]
    Preventive vs. Reactive Maintenance: Key Differences and Costs
    Advanced Technology Services · Accessed 2026-06-21

Related terms

Tags

maintenance manufacturing reliability tpm procedures

Last reviewed: 2026-06-21

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