A CMMS (computerized maintenance management system) is software that schedules, assigns, tracks, and records maintenance work on equipment and facilities. It replaces paper logs and spreadsheets with one database of assets, work orders, preventive maintenance (PM) schedules, spare parts, and repair history. For manufacturers, a CMMS is only as accurate as the data that triggers it: most run PM off calendar dates or manually entered meter readings unless they are connected to live machine data.

In practice, a CMMS is the system of record for your maintenance team. When a spindle bearing gets replaced, a press gets lubricated, or a technician closes out an emergency repair, the CMMS logs who did it, when, what parts were used, and how long the machine was down.

This guide is for maintenance managers, plant managers, and manufacturing engineers deciding whether they need CMMS software. It covers what a CMMS does, how it works, what it costs, how it compares to EAM and machine monitoring, and when a built-in PM tool covers the job for less.

What Does a CMMS Do?

A CMMS handles six core jobs: tracking assets, managing work orders, scheduling preventive maintenance, controlling spare parts, recording maintenance history, and reporting on performance. Most platforms bundle all six, though the depth of each varies by vendor and pricing tier.

Many CMMS platforms also include work request portals, so operators can flag a problem without a full user license, and purchasing tools for parts and vendor management.

How Does a CMMS Work?

A CMMS works by connecting an asset list to a set of maintenance rules, then generating and tracking the work those rules call for. The basic cycle runs in five steps:

  1. Build the asset register. Every machine, sub-component, and critical spare gets entered into the system with its specs and criticality.
  2. Define maintenance tasks and triggers. For each asset, the team sets what needs to be done (inspect, lubricate, replace, calibrate) and what triggers it (a date, a usage count, or a condition).
  3. Generate work orders. When a trigger is met, the CMMS creates a work order and assigns it to a technician or team.
  4. Complete and log the work. Technicians record labor time, parts used, findings, and follow-up needs, usually from a mobile device on the floor.
  5. Review and adjust. Reports show overdue tasks, repeat failures, and cost by asset, which the team uses to tune intervals and decide where to invest.

The Three Ways a CMMS Triggers Preventive Maintenance

The trigger is where most CMMS programs succeed or fall short. There are three common types:

Here is the catch for manufacturers. A CMMS does not generate machine data on its own. Usage-based and condition-based triggers only work if meter readings are entered by hand or pulled from a separate machine monitoring system. In many CMMS products, meter-based scheduling and IoT integrations also sit in higher-priced tiers. That is why many plants that buy a CMMS still end up running PM on a calendar instead of on actual machine usage.

What Are the Benefits of a CMMS for Manufacturers?

The biggest benefit of a CMMS is moving maintenance from reactive to planned work, which cuts unplanned downtime and lowers total maintenance cost. The financial case is strong. Siemens' True Cost of Downtime 2024 report estimates that unplanned downtime costs the world's 500 largest companies about $1.4 trillion a year, or 11% of their revenue.

The U.S. Department of Energy's O&M Best Practices Guide estimates that a well-run preventive maintenance program saves 12% to 18% compared to reactive maintenance. A CMMS is the tool most plants use to run that program consistently.

CMMS vs. EAM vs. Machine Monitoring: What's the Difference?

A CMMS manages maintenance work, an EAM manages the full lifecycle of assets, and a machine monitoring system collects live data from the machines themselves. They overlap, but each answers a different question.

The practical takeaway: a CMMS tells your team what to do, and machine monitoring tells the CMMS when to do it based on real usage. Plants that want usage-based PM need both functions, either as two connected systems or as one platform that does both.

How Much Does CMMS Software Cost?

Most CMMS software is priced per user per month, with published 2026 rates ranging from free tiers to roughly $20 to $75 per user per month, and custom pricing for enterprise plans. The sticker price is only part of the cost.

To put that in real numbers, 10 technicians on a $65 per user per month plan cost $7,800 a year before implementation. Budget separately for:

For a side-by-side look at pricing and fit, see our breakdown of the best CMMS software in 2026.

Do Manufacturers Need a Full CMMS?

Not always. A full CMMS makes sense when maintenance spans many asset types, large teams, spare parts purchasing, and facility work. When the main goal is running preventive maintenance on production machines based on how they actually run, a machine monitoring platform with a built-in PM tool often covers the need at a lower total cost.

A full CMMS is usually the right fit if your plant has:

A built-in PM tool is often enough if:

How Caddis Handles Preventive Maintenance

Caddis is a machine monitoring platform with a built-in preventive maintenance tool. Because the platform already collects data from every connected machine, PM schedules run on real usage from day one.

For plants that pair Caddis with an existing CMMS or ERP, the platform integrates through a REST API, and also connects with systems like SAP, NetSuite, and Microsoft Dynamics.

How to Choose and Implement a CMMS

Start with the problem you are trying to fix, then pick the tool. Plants that buy software first and define the process later usually end up with a half-used system.

  1. Define the goal. Fewer breakdowns, better PM compliance, audit readiness, or lower parts spend. Each points to different features.
  2. Rank assets by criticality. Focus first on machines where a failure stops production or creates a safety risk.
  3. Decide how PM will be triggered. If you want usage-based maintenance, confirm where the meter data will come from before you buy.
  4. Check integrations. Confirm the system connects with your ERP, machine data source, and any existing maintenance records.
  5. Pilot on a small group of machines. Prove the workflow and adoption on five to ten assets before rolling out plant-wide.
  6. Train and measure adoption. Track how many work orders are opened and closed in the system. Low usage is an early warning sign.

For more on the shift away from time-based schedules, see our guide on preventive vs. predictive maintenance and our overview of the types of maintenance in manufacturing.

FAQ

What does CMMS stand for?

CMMS stands for computerized maintenance management system. It is software that maintenance teams use to manage assets, schedule preventive maintenance, track work orders, and record maintenance history in one place.

What is the difference between a CMMS and an EAM?

A CMMS focuses on maintenance execution: work orders, PM schedules, parts, and history. An EAM covers the full asset lifecycle, adding procurement, capital planning, and financial tracking across multiple sites. Smaller and mid-sized manufacturers usually need a CMMS or a PM tool, not a full EAM.

Can a CMMS do predictive maintenance?

Only if it receives live condition data. A CMMS can store thresholds and generate work orders when readings cross them, but it needs sensors and a machine monitoring system feeding it vibration, temperature, current, or usage data. On its own, a CMMS runs time-based or manually logged maintenance.

Can a spreadsheet replace a CMMS?

For a handful of machines, a spreadsheet can track basic PM dates. It breaks down as the fleet grows because it can't generate work orders, track parts, alert technicians, or pull in machine usage data. Most plants outgrow spreadsheets once missed PMs start causing breakdowns.

How long does it take to implement a CMMS?

A small deployment covering one site and a limited asset list can go live in a few weeks. Multi-site rollouts with data migration, ERP integration, and machine data connections often take several months. Most of the time goes into building the asset register and PM schedules, not installing the software.

Conclusion

A CMMS is software that schedules, tracks, and records maintenance work, and it is the backbone of most preventive maintenance programs. For manufacturers, the deciding factor is how PM gets triggered: a CMMS without live machine data defaults to calendar schedules. If your priority is maintaining production machines based on how they actually run, a machine monitoring platform with built-in PM may cover what you need. Book a demo to see how Caddis schedules maintenance from real machine data.