Preventive MaintenanceComplete Guide + Free Software
Everything you need to know about preventive maintenance: definition, types, implementation
Learn how to implement an effective preventive maintenance program and discover FreeMaint, the free CMMS software that automates your preventive maintenance.
What is Preventive Maintenance?
Preventive maintenance consists of performing planned interventions on equipment BEFORE a failure occurs. Unlike corrective maintenance that intervenes after a defect, it aims to prevent problems.
Main objectives:
- Reduce unplanned failures (up to 70% reduction)
- Extend equipment lifespan
- Optimize maintenance costs
- Improve safety
- Increase machine availability
Types of Preventive Maintenance
Systematic Maintenance
Interventions at regular intervals (time or cycles), regardless of equipment condition.
Examples:
- Oil change every 10,000 km
- Filter cleaning every week
- Annual inspection
Condition-Based Maintenance
Interventions based on actual equipment condition, measured through monitoring.
Examples:
- Replacement when vibrations exceed threshold
- Lubrication if temperature is high
- Replacement if visible wear
Predictive Maintenance
Prediction of failures through data analysis and sensors (Industry 4.0 maintenance).
Examples:
- Vibration analysis
- Infrared thermography
- Oil analysis
- Machine learning
Preventive vs Corrective Maintenance
| Aspect | Preventive | Corrective |
|---|---|---|
| Timing of Intervention | BEFORE failure | AFTER failure |
| Planning | Planned | Unplanned (emergency) |
| Production Downtime | Scheduled and short | Unexpected and long |
| Part Costs | Optimized (advance order) | High (urgent) |
| Labor Costs | Optimized (normal hours) | High (overtime, on-call) |
| Equipment Lifespan | Extended | Reduced |
| Safety | Improved | Increased risks |
| Visibility | Planning possible | None |
Typical ROI: A well-executed preventive maintenance program generates a return on investment of 3 to 10 times its cost.
How to Implement a Preventive Maintenance Program
Inventory Equipment
List all critical equipment at your facility. Collect technical information (manufacturer, model, installation date). Identify components subject to wear. Define the criticality of each equipment (impact on production, safety, cost).
Define Intervention Frequencies
Consult manufacturer recommendations for each equipment. Analyze failure history to identify weak points. Consider specific operating conditions. Define frequencies based on time (days, weeks) or counters (hours, kilometers, cycles).
Create Maintenance Plans
For each intervention, describe the tasks to perform step by step. Specify tools and spare parts needed. Estimate intervention duration. Define required skills (electrician, mechanic, etc.).
Schedule and Track with CMMS
Use CMMS software like FreeMaint to automate scheduling. Work orders are automatically generated according to defined frequencies. Monitor execution in real-time. Analyze results and adjust frequencies if necessary.
Key Performance Indicators (KPIs)
Indicates equipment reliability
Formula: Operating time / Number of failures
Target: The higher the better
Measures repair speed
Formula: Total repair time / Number of failures
Target: The lower the better
Percentage of time equipment is operational
Formula: (Operating time / Total time) x 100
Target: > 95%
Balance between planned and reactive maintenance
Formula: (Preventive interventions / Total) x 100
Target: > 70% preventive
Maintenance Plans by Industry
Manufacturing
Equipment: Hydraulic Press
| Frequency | Tasks |
|---|---|
| Daily | Oil level check, visual inspection |
| Weekly | Filter cleaning, pressure verification |
| Monthly | Lubrication, alignment verification |
| Annual | Oil change, seal inspection |
Building / Facility
Equipment: Air Conditioning Unit
| Frequency | Tasks |
|---|---|
| Monthly | Filter cleaning, temperature verification |
| Quarterly | Seal inspection, evaporator cleaning |
| Annual | Refrigerant check, electrical verification |
Hospitality
Equipment: Elevator
| Frequency | Tasks |
|---|---|
| Daily | General functionality check |
| Monthly | Cabin cleaning, lighting inspection |
| Annual | Mandatory regulatory inspection |
Free Preventive Maintenance Software
FreeMaint fully automates your preventive maintenance:
- Automatic intervention scheduling
- Automatic work order generation
- Triggering by time or counter
- Alerts and notifications
- Automatic MTBF, MTTR calculation
- Reports and dashboards
- Mobile app for technicians
- Core tier free with unlimited users
Frequently Asked Questions
What is preventive maintenance?
Preventive maintenance consists of performing planned interventions on equipment BEFORE a failure occurs. It aims to reduce equipment failures, extend machine lifespan, and optimize maintenance costs. There are three types: systematic maintenance (fixed intervals), condition-based maintenance (based on equipment state), and predictive maintenance (using data analysis).
What is the difference between preventive and corrective maintenance?
Corrective maintenance intervenes AFTER the failure to repair the equipment, while preventive maintenance acts BEFORE to avoid failure. Corrective maintenance is often more expensive (emergency, unplanned downtime, unavailable parts) while preventive maintenance allows you to plan and optimize interventions.
How do you calculate MTBF and MTTR indicators?
MTBF (Mean Time Between Failures) = Total operating time / Number of failures. MTTR (Mean Time To Repair) = Total repair time / Number of failures. A high MTBF and low MTTR indicate effective maintenance. FreeMaint calculates these indicators automatically.
What is the ROI of a preventive maintenance program?
The return on investment of a well-executed preventive maintenance program is typically 3 to 10 times the cost of the program. Companies typically see: -70% unplanned failures, -25% maintenance costs, +20% equipment lifespan, +15% productivity.
What software should I use to manage preventive maintenance?
A CMMS (Computerized Maintenance Management System) is the ideal tool. FreeMaint is a free CMMS Core tier that allows you to automatically plan preventive maintenance, generate work orders, monitor real-time execution, analyze results, and adjust frequencies as needed. No subscription or limits.
How do you determine preventive maintenance frequencies?
Frequencies are determined based on: 1) Manufacturer recommendations, 2) Historical failure data, 3) Operating conditions (intensity, environment), 4) Equipment criticality. FreeMaint allows you to easily adjust frequencies and trigger them by time or counter (hours, kilometers, cycles).
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