In most small factories, maintenance runs on a breakdown register, a PM chart on the wall and the memory of one experienced technician. It works — until that technician is on leave, an auditor asks for PM records, or the same machine fails for the third time in a month.
What a CMMS actually does
A CMMS (Computerised Maintenance Management System) is software that organises everything about machine maintenance:
- Machine and asset register — every machine with a QR tag, specs, documents and warranty.
- Breakdown requests — operators scan the machine and report a problem from their phone.
- Work orders — assigned to a technician, with checklist, photos, time taken and spares used.
- Preventive maintenance — daily, weekly, monthly or running-hour based schedules that create jobs automatically.
- Spare parts — issued against work orders, with alerts when critical spares run low.
- History and reports — MTTR, MTBF, breakdown Pareto and maintenance cost by machine.
The flow, step by step
Machine → Asset → Maintenance schedule → Technician → Work order → Spare parts → Downtime → Maintenance history → Reports. Each step feeds the next, so the history card of every machine builds itself as work gets done.
Signs you've outgrown the register
- You can't say which five machines caused the most downtime last quarter.
- Preventive maintenance is skipped whenever production is busy — and nobody notices.
- A cheap spare part stops a line for two days.
- Audit preparation means reconstructing PM records.
Ready-made or custom?
Ready-made CMMS tools work well when your process is standard. Custom software makes sense when you want maintenance connected to your own production, stores or quality processes, when technicians need local-language screens, or when per-user subscription fees add up across a large team. See custom vs off-the-shelf software.
A practical rollout: week 1–2, register machines and print QR tags; week 3–4, breakdown requests and work orders; then preventive schedules; then spares and reports. Technicians see value from the first week, which is what makes adoption stick.
Setting up preventive maintenance that actually gets done
The most common CMMS failure is a beautiful PM plan that nobody follows. To avoid it:
- Start with critical machines — the ones whose failure stops production or causes safety issues.
- Use manufacturer recommendations as a starting point, adjusted by your experience.
- Keep tasks short and specific — "check hydraulic oil level and top up" beats "general check".
- Schedule PM into planned stops — coordinate with production planning so PM isn't always the first thing cancelled.
- Measure PM compliance weekly and discuss misses in the production meeting.
Autonomous maintenance: involving operators
Many routine checks — cleaning, lubrication points, visual inspection, tightening — are best done by operators at the start of the shift. A CMMS can give operators a short daily checklist on a tablet or phone, with abnormalities raised as maintenance requests. This is the core idea of autonomous maintenance in TPM, and it frees technicians for skilled work.
Understanding MTTR and MTBF
MTTR (mean time to repair) is total repair time divided by number of repairs — it measures how quickly your team restores machines. MTBF (mean time between failures) is total operating time divided by number of failures — it measures reliability. A good CMMS calculates both from breakdown records automatically. Rising MTBF means your preventive work is paying off; falling MTTR means your team, spares and procedures are improving.
Spare parts: the hidden downtime driver
Many long breakdowns aren't caused by difficult repairs but by waiting for a part. Classify spares by criticality, keep minimum stock for critical items, link spares to the machines they fit, and let the CMMS raise reorder alerts. Over time, consumption history shows which spares are really needed and which are tying up cash.
Maintenance cost visibility
When labour hours, spares and external services are recorded against each work order, maintenance cost per machine becomes visible. That supports budgeting, shows which machines are becoming expensive to keep, and builds the case for replacement or overhaul.
What to look for in a maintenance app for technicians
- Scan a machine QR code to see its history and open jobs.
- Checklists with readings, photos and pass/fail.
- Record spares used from stock.
- Log time taken and root cause.
- Work offline in areas with poor connectivity.
Measuring the impact of your CMMS
Record a baseline before go-live, then compare after three and six months:
- Breakdown hours per month on critical machines.
- PM compliance — planned tasks completed on time.
- MTTR and MTBF per machine.
- Emergency spare purchases — fewer means better planning.
- Maintenance cost per machine and per unit produced.
Share these numbers with production as well as maintenance. When production sees fewer breakdowns, it becomes much easier to protect PM time in the schedule — which in turn reduces breakdowns further. That virtuous circle is the real goal of a CMMS.
CMMS and OEE together
Breakdowns are one of OEE's six big losses. When maintenance work orders and downtime records live in the same system, you can see exactly how much availability each machine loses to breakdowns, and whether PM changes are improving it. See how to calculate OEE.
Choosing between a ready-made CMMS and a custom one
Ready-made CMMS products are quick to start and work well for standard maintenance management. A custom CMMS is worth considering when maintenance needs to connect tightly with your production booking, stores or quality systems; when technicians need screens in local language; or when you have many users and want to avoid per-user subscription fees. Whichever route you take, judge it by whether technicians use it daily — that's what produces the data.
Corposol builds manufacturing maintenance software (CMMS), preventive maintenance and factory asset management systems. Tell us how maintenance runs in your plant.
