A CMMS — computerised maintenance management system — is software that keeps a record of every machine and runs its maintenance: preventive work created on schedule, breakdowns reported and fixed, spares used, and downtime recorded. Its job is simple to state: fewer surprise breakdowns, and faster fixes when they happen.
This guide covers how a CMMS works on the shop floor, what to measure, and how to roll one out. To see work orders moving from report to close, try the CMMS demo.
Three kinds of maintenance
- Reactive: fix it when it breaks. Cheap until a critical machine stops during a rush order.
- Preventive: service it on a schedule — every month, every 250 running hours — before it fails.
- Predictive: watch signs like vibration, temperature or current and act when they drift.
Most plants run a mix. A CMMS makes preventive maintenance actually happen, and gives you the history you need before predictive maintenance is worth trying.
What a CMMS does
An equipment register
Every machine and utility — make, model, location, manuals, spares and full history — opened by scanning a QR code on the machine. When the experienced technician is on leave, the history isn't.
Schedules that create work
Preventive tasks are set by date (monthly compressor service), by running hours or meter readings (DG set every 250 hours), or both. The CMMS creates the work order, assigns it and reminds the team; overdue preventive work is visible to the plant head.
Breakdowns in one scan
An operator scans the machine's QR code and reports the problem with a photo. The right technician is alerted with the machine's history in hand.
Checklists on the phone
Technicians follow checklists — including lock-out before work — record readings and spares used, and close with the root cause. That last field is what turns a log into learning.
Spares
Critical spares are reserved for jobs and reordered at minimum levels, so a ₹2,000 seal doesn't stop a ₹50-lakh machine for three days.
The numbers that matter
- Preventive compliance: the share of scheduled work done on time. Start here — it's the habit everything else depends on.
- Downtime by machine: hours lost, and why. A handful of machines usually cause most of it.
- MTTR (mean time to repair): total repair time ÷ number of repairs. Falls when technicians have history, checklists and spares ready.
- MTBF (mean time between failures): operating time ÷ number of failures. Rises when preventive maintenance works.
- Repeat faults: the same cause on the same machine within 90 days — a sign the fix treated the symptom.
Statutory inspections
Boilers, lifts, pressure vessels, cranes and fire systems have inspections and certificates required by law. A CMMS schedules them like any other task, stores the certificates against the equipment, and warns before they expire — which also makes audits far less stressful.
Rolling it out without stopping the plant
- Start with the critical machines — the 20 or 30 whose failure stops production — not all 400 assets.
- Tag them with QR codes and enter make, model and the last service date.
- Set preventive schedules from the manuals and your technicians' experience.
- Switch breakdown reporting to the QR scan, and stop accepting shouted requests.
- Review weekly: overdue preventive work, top downtime machines, repeat faults.
- Add the rest of the equipment, spares and statutory inspections once the habit holds.
Common mistakes
- Loading everything at once. Thousands of assets with no schedules is a database, not maintenance.
- Skipping root cause. Without it, the same breakdown keeps coming back.
- Making it hard for technicians. If closing a job takes longer than doing it, the data dies. Phone screens, big buttons and Hindi help.
- No review. Reports nobody reads change nothing. A 15-minute weekly look is enough.
Ready-made or built for your plant?
Ready-made CMMS products suit standard set-ups. A custom CMMS earns its place when it must fit your asset hierarchy, connect to your ERP for spares and costs, read running hours from PLCs, or work in Hindi on the shop floor. You also own it rather than paying per user every year.
The short version
A CMMS makes preventive maintenance happen on schedule, gets breakdowns to the right technician with the history in hand, and shows which machines cost you the most downtime. Start with the critical machines, insist on root causes, and review the numbers every week.
Try the CMMS demo, see asset management software, or talk to us about your plant.