A preventive maintenance schedule is a plan that lists which maintenance tasks are done on which equipment, how often, by whom and how long they take, so that the work is done before something fails instead of after.
This guide explains what goes into one, how to set the intervals, how to build a schedule step by step, and how to keep it working once it exists. It includes a worked example from the PM task library behind our free preventive maintenance schedule generator, and a section for each industry we work with.
What is a preventive maintenance schedule?
It is the calendar side of a preventive maintenance programme. The programme decides what to maintain and why. The schedule says when, and turns that into jobs a technician can pick up on the day.
A good schedule answers four questions for every task: what is to be done, on which asset, at what interval or trigger, and how will we know it was done. If any of those is vague, the task slips.
What goes into a preventive maintenance schedule
| Element | What to record |
|---|---|
| Asset | The exact machine or unit, ideally with a tag or QR code, so the task is tied to one piece of equipment. |
| Task | A specific action: “check oil level, discharge pressure and temperature”, not “inspect compressor”. |
| Frequency or trigger | A calendar interval, or a usage trigger such as running hours, meter readings or cycles. |
| Time needed | An estimate per task, so you can see the monthly workload and avoid overloading one week. |
| Who | The trade or skill needed (mechanical, electrical, instrument), and the person or team responsible. |
| Parts and tools | Filters, oil, belts and special tools, so the job does not stop for a missing part. |
| Safety steps | Isolation, lockout, permits and PPE where the task needs them. |
| Record | Who did it, when, what was found and what was replaced. This is what makes the schedule auditable. |
Types of preventive maintenance triggers
- Calendar-based: every week, month or year, regardless of how much the machine ran. Simple, and right for tasks driven by time, such as statutory inspections or filter changes in a standby unit.
- Usage-based: after a number of running hours, cycles, units produced or kilometres. Better for equipment that works unevenly, such as a DG set or a fleet vehicle. PlantOps360 can trigger preventive maintenance by calendar date, running hours, meter readings or production cycles.
- Condition-based: when a reading crosses a limit, such as vibration, temperature or pressure. This moves towards predictive maintenance; see whether predictive maintenance is right for your plant.
- Fixed versus floating: a fixed schedule repeats on set dates. A floating schedule counts from when the last task was actually completed, which avoids two services being done close together when one is late.
Typical preventive maintenance frequencies
Intervals depend on the equipment, its duty, its environment and the maker’s manual. As a starting point, most general-purpose equipment falls into these bands:
| How often | Typical tasks |
|---|---|
| Daily | Walk-round checks of levels, pressures, temperatures, leaks and abnormal noise; draining condensate. |
| Weekly | Cleaning or checking filters, testing alarms and cut-offs, running standby equipment. |
| Monthly | Lubrication, checking belts, couplings and bearings, recording vibration readings. |
| Quarterly | Cleaning coolers and coils, checking alignment, testing control and change-over panels. |
| Half-yearly | Changing oil and filters, checking foundation bolts and balance. |
| Annual | Overhauls, statutory inspections, calibration, replacement of wear parts. |
Example: a preventive maintenance schedule for a screw air compressor
This is the schedule our generator proposes for a screw air compressor. It has 7 tasks. At the estimated times below it adds up to about 84 hours of work per compressor per year, if the daily checks are done every day of the year.
| How often | Task | Estimated time |
|---|---|---|
| Daily | Check oil level, discharge pressure and temperature | 5 min |
| Daily | Drain condensate from receiver and separators (if not automatic) | 5 min |
| Weekly | Clean or check intake air filter | 10 min |
| Monthly | Check belts and couplings; check for air leaks | 30 min |
| Quarterly | Clean cooler fins | 45 min |
| Half-yearly | Replace oil filter and air filter element | 60 min |
| Annual | Replace oil and separator element; check safety valve | 180 min |
Treat it as a starting point. The maker’s manual and your site safety procedures come first wherever they differ. For more schedules like this, see the guides for air compressors, DG sets, boilers, centrifugal pumps, air handling units and belt conveyors. Browse all equipment preventive maintenance schedules or preventive maintenance schedules by industry.
How to build a preventive maintenance schedule, step by step
- List your assets and rank them by criticality. Start with the equipment whose failure stops production, creates a safety risk or breaches a licence condition. A clean asset hierarchy makes everything after this easier; see how to build an asset hierarchy that works.
- Collect the sources of requirements. The maker’s manual, statutory requirements, insurer or customer conditions, and your own failure history.
- Write specific tasks. One action, one checkable result. Add the time, the skill and the parts.
- Set the interval or trigger. Use the manual as the base, then adjust for duty and environment. A compressor in a dusty foundry needs its filters checked more often than one in a clean room.
- Balance the workload. Add up the estimated hours by month. If March has three times the work of April, move tasks within their tolerance so the team is not overloaded in one week and idle in the next. The generator shows this as monthly workload hours.
- Issue the work as jobs, not as a list. Each task should reach a technician as a work order with its checklist, and be closed with a recorded result. See how preventive maintenance software works.
- Review every quarter. Look at which tasks found nothing for a year, which assets still fail between services, and adjust. A schedule that never changes is probably wrong in both directions.
Statutory and compliance items to include in India
Some tasks are not a matter of choice. Depending on your plant, a complete schedule usually carries entries for:
- Boilers and steam piping: inspection and certification by the inspecting authority under the boilers law, usually annually.
- Pressure vessels and air receivers: examination at the interval required by your state’s factory rules.
- Lifting machines and tackle: cranes, hoists, lifts and slings examined by a competent person at the required interval, with the certificate kept.
- DG sets and stacks: emission and noise monitoring as the consent conditions require.
- Fire pumps and systems: regular run tests and inspections, with a log.
- Calibration: measuring instruments at the interval your quality system or licence requires.
Intervals set by law differ by state and by the type of equipment. Always check the current rules that apply to your site.
Preventive maintenance schedules by industry
The same method applies everywhere, but each industry has a few assets that decide the schedule. Each row below links to our maintenance software page for that industry, and to the free generator with that industry already selected.
| Industry | What the schedule focuses on | Go to |
|---|---|---|
| Automotive components | Presses, CNC machines, robots and paint-shop utilities, where a line stoppage stops the customer’s line too. | Maintenance software · Preventive maintenance schedule for automotive components |
| Chemicals | Reactors, pumps, heat exchangers and relief valves, where inspection ties into process safety. | Maintenance software · Preventive maintenance schedule for chemicals |
| Electronics | Cleanroom air handling, SMT lines and power quality for sensitive equipment. | Maintenance software · Preventive maintenance schedule for electronics |
| FMCG | High-speed filling and packing lines, where many small stoppages add up. | Maintenance software · Preventive maintenance schedule for fmcg |
| Food processing | Hygiene-critical equipment, boilers and refrigeration, with records for food-safety audits. | Maintenance software · Preventive maintenance schedule for food processing |
| Dairy | Pasteurisers, ammonia refrigeration and cleaning-in-place systems, with calibration at critical control points. | Maintenance software · Preventive maintenance schedule for dairy |
| Packaging and printing | Printing, converting and packing machines and the compressed air they depend on. | Maintenance software · Preventive maintenance schedule for packaging and printing |
| Paper and pulp | Paper machine drives, dryers, boilers and the effluent plant. | Maintenance software · Preventive maintenance schedule for paper and pulp |
| Pharmaceutical | Validated equipment, calibration and cleanroom air handling, with audit-ready records. | Maintenance software · Preventive maintenance schedule for pharmaceutical |
| API and bulk drugs | Reactors, centrifuges and dryers, planned around production campaigns. | Maintenance software · Preventive maintenance schedule for api and bulk drugs |
| Plastics and polymers | Injection moulding machines, chillers, hydraulics and moulds. | Maintenance software · Preventive maintenance schedule for plastics and polymers |
| Tyre and rubber | Mixers, extruders and curing presses, with moulds and bladders tracked as consumables. | Maintenance software · Preventive maintenance schedule for tyre and rubber |
| Power plants | Boilers, turbines and auxiliaries, with statutory inspections. | Maintenance software · Preventive maintenance schedule for power plants |
| Renewable energy | Inverters, trackers and turbines across remote sites. | Maintenance software · Preventive maintenance schedule for renewable energy |
| Textile | Hundreds of similar looms and frames, plus compressors, humidification and boilers. | Maintenance software · Preventive maintenance schedule for textile |
| Steel and metals | Cranes, furnaces, mill stands and hydraulics working in heat and load. | Maintenance software · Preventive maintenance schedule for steel and metals |
| Cement | Kiln, mills and fans, and a shutdown list built from real data. | Maintenance software · Preventive maintenance schedule for cement |
| Mining | Fleet services by engine hours, crushers and conveyors in remote sites. | Maintenance software · Preventive maintenance schedule for mining |
| Oil and gas | Rotating equipment, inspection of pressure equipment and safety-critical tests. | Maintenance software · Preventive maintenance schedule for oil and gas |
| Sugar and distilleries | Season rounds, the off-season overhaul, boilers and cogeneration. | Maintenance software · Preventive maintenance schedule for sugar and distilleries |
Excel or maintenance software?
A spreadsheet is a fine place to start for a handful of machines. It stops working when tasks need to reach technicians, when someone has to prove that a task was done, or when the same sheet is edited by several people. Software turns each due task into a work order, reminds the team, and keeps the history on the asset. We compare the two in CMMS vs spreadsheets: the real cost of Excel. If you want to see it running, look at the preventive maintenance software page, or work orders for how the jobs are handled.
Common mistakes
- Vague tasks. “Inspect pump” cannot be done or checked. “Check seal for leaks, bearing temperature and noise” can.
- Ignoring the manual. Copying a generic schedule without checking the maker’s intervals.
- Over-maintaining. Replacing parts early without a reason adds cost and introduces errors.
- No feedback loop. Findings are not recorded, so the intervals are never improved.
- Everything due in the same week. Without load balancing, tasks are skipped.
- No owner. A task with no named person or team is a task nobody does.
Planned work costs less than breakdown work, and we put numbers on that in preventive vs reactive maintenance: the real cost difference. To track whether the schedule is working, use MTTR, MTBF and availability alongside your PM compliance rate.
Get a ready-made schedule
Choose your industry and equipment in our free generator and get a 12-month schedule with tasks, frequencies and monthly workload hours, as an Excel file.
Open the free preventive maintenance schedule generator
Preventive maintenance schedule by equipment
Each page gives the preventive maintenance schedule and checklist for one type of equipment: the tasks from daily to annual, the time they take, what to watch between services and the standards that apply. Start from a group of equipment, or open the full list of 317 equipment types.
- Electrical distribution & power quality preventive maintenance schedules (19)
- Food, dairy & beverage preventive maintenance schedules (16)
- Machine tools, metalworking & assembly preventive maintenance schedules (16)
- Pharmaceutical & biotech preventive maintenance schedules (15)
- Fire protection & safety preventive maintenance schedules (14)
- HVAC & refrigeration preventive maintenance schedules (13)
- Furnaces, foundry & surface treatment preventive maintenance schedules (13)
- Oil, gas, power plant & environment preventive maintenance schedules (13)
- Water & effluent treatment preventive maintenance schedules (12)
- Mining, cement, metals & minerals preventive maintenance schedules (12)
- Healthcare & hospital preventive maintenance schedules (12)
- Cranes, lifting & material handling preventive maintenance schedules (11)
- Conveying, bulk handling & dust control preventive maintenance schedules (11)
- Instruments, automation & laboratory preventive maintenance schedules (11)
- Buildings & facilities preventive maintenance schedules (11)
- Pumps preventive maintenance schedules (10)
- Process & chemical equipment preventive maintenance schedules (10)
- Textile, paper, garment & printing preventive maintenance schedules (10)
- Agro, grain & sugar processing preventive maintenance schedules (10)
- Plastics & rubber preventive maintenance schedules (9)
- Valves, piping & hydraulics preventive maintenance schedules (9)
- Compressors & compressed air preventive maintenance schedules (8)
- Power generation & backup preventive maintenance schedules (8)
- Packaging, filling & inspection preventive maintenance schedules (8)
- Motors, drives & power transmission preventive maintenance schedules (7)
- Boilers, steam & thermal systems preventive maintenance schedules (7)
- Fans, blowers, vacuum & ventilation preventive maintenance schedules (6)
- Heat exchangers, vessels & storage preventive maintenance schedules (6)
- Transport, ports & logistics preventive maintenance schedules (6)
- Other equipment preventive maintenance schedules (4)
Also read the preventive maintenance schedule template and the preventive maintenance checklist.
Frequently asked questions
What is a preventive maintenance schedule?
It is a plan listing the maintenance tasks for each piece of equipment, how often each is done, how long it takes and who does it, so that work is done before failures happen.
How do I decide how often to do preventive maintenance?
Start with the equipment maker’s manual, then adjust for how hard the machine works, its environment and its failure history. Statutory tasks follow the interval set by the rules that apply to your site.
What is the difference between calendar-based and usage-based schedules?
Calendar-based tasks are done at fixed time intervals. Usage-based tasks are triggered by running hours, cycles or meter readings, which suits equipment that works unevenly.
What is the difference between preventive and predictive maintenance?
Preventive maintenance is done at planned intervals. Predictive maintenance uses the actual condition of the equipment, such as vibration or temperature trends, to decide when work is needed. Many plants use both.
Can I make a preventive maintenance schedule in Excel?
Yes. List the assets, tasks, frequencies, estimated times and owners. For larger plants the limits show up quickly, because tasks do not reach technicians and completion is not recorded. Our free generator creates the Excel file for you.
How many hours of preventive maintenance does one machine need a year?
It varies widely. In our task library, a screw air compressor comes to about 84 hours a year at the estimated times, including daily checks. Use that as an order of magnitude, not a rule.
Who should own the preventive maintenance schedule?
The maintenance planner or maintenance head owns the schedule. Each task needs a named person or team, and the schedule should be reviewed with production at least quarterly.