Organizes assets
What equipment exists, where it is and what it depends on. The hierarchy is what lets you reason at the level of a system rather than a loose part.
Guide
What is a CMMS
The acronym, what’s behind it, and why most organizations end up needing one even after years of running without it.
CMMS, in one sentence
CMMS stands for Computerized Maintenance Management System, and it designates the system where an organization records its assets and everything done to them: work orders, periodic inspections, breakdowns, materials consumed and who did the work. The key word in that definition is "records". A CMMS doesn’t perform maintenance or decide it: it turns it into a history per piece of equipment, and that history is what later lets you answer questions that, without it, are just opinions.
CMMS, GMAO, EAM: what each acronym means
CMMS —Computerized Maintenance Management System— is the English term, and GMAO the Spanish one: they mean the same thing and are used interchangeably, including in Spain. EAM, for Enterprise Asset Management, designates something broader: alongside maintenance it includes managing the asset across its whole lifecycle, including valuation, depreciation and the associated investment decisions. In practice the line between a full CMMS and an EAM is blurry, and each vendor draws it wherever suits them. To decide, it’s more useful to look at what the product actually does than at which acronym it uses.
When an organization needs one
There’s no asset count above which you need one. There are symptoms.
- No one can say how many times a given piece of equipment has failed without going and looking it up.
- Preventive maintenance gets done "whenever there’s time", and what gets skipped leaves no trace.
- You have to prove to a client or an inspector something that was done eight months ago.
- Two people hold all the knowledge about the facility.
- You can’t back with data whether it’s worth repairing again or replacing.
- You know total maintenance cost, but not per piece of equipment or per site.
What a CMMS does
The functions that define the category, regardless of what each vendor calls them.
Records the work
Every intervention with its hours, its materials and its evidence, attributed to the equipment it was performed on.
Automates the periodic work
Due inspections generate themselves, with their checklists. It stops depending on someone’s memory.
Turns that into information
Cost per asset, reliability, plan compliance. These aren’t separate features: they’re the consequence of having recorded things properly.
How it differs from what you already have
From a spreadsheet, in that a spreadsheet doesn’t relate data: it might have the list of equipment and the list of interventions, but it can’t answer "what’s been done to this pump" without someone cross-referencing it by hand. From an ERP, in that an ERP manages the business —invoicing, accounting, purchasing— while a CMMS manages maintenance; they’re complementary and it’s normal to integrate them. From a CAFM, in that a CAFM manages space: floor area, occupancy and workstations, not equipment and interventions. And from a work-order app, in that it records the work but doesn’t anchor it to the asset, so you never end up with a history per piece of equipment, which is exactly what gives everything else its value.
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What a CMMS is not
Worth drawing the line, because the term gets stretched a lot in sales pitches. A CMMS is not an ERP: it doesn’t invoice, doesn’t handle accounting or company purchasing, though it may integrate with whatever does. It’s not a CAFM: it doesn’t manage square footage, occupancy or workstations. It’s not an industrial control system: it doesn’t read sensors in real time or run a plant, though it may receive readings. And it’s not a project management tool: it groups jobs under a project to add up cost, but it doesn’t schedule tasks with dependencies or issue construction certifications. Each of those four things is done better by another product category, and a CMMS that promises all five usually does one well and the other four half-heartedly.
The vocabulary you’ll hear
With the formal word and the one people actually use day to day.
- Work order or ticket: the document for an intervention. Both terms are used interchangeably.
- Asset, equipment or machine: what gets maintained. "Asset" is the system term; on the floor people just say machine.
- Checklist or routine: the list of checks for an inspection. This is the traditional term and the most precise one.
- Corrective: repairing something that already failed. Preventive: inspecting it before it fails.
- MTBF and MTTR: mean time between failures and mean time to repair. Used without translation.
- Criticality: how much it matters if a given piece of equipment stops. It’s what sets priorities.
- Dispatcher: whoever is responsible for a request moving forward. Not always the person who does the work.
Why some rollouts fail
Worth knowing before you start, because the reasons repeat. The most common is that logging work costs more than not logging it: if the technician has to go back to the office, open a computer and fill in a thirty-field screen, they won’t do it, and without logging, the system is useless no matter how many features it has. The second is starting with a full inventory: an eight-month project to register the entire plant gets abandoned by month four. The third is digitizing a process that didn’t work in the first place, which just makes it not work faster. And the fourth is training the managers and not the people doing the work.
Frequently asked questions
What does CMMS mean?
Computerized Maintenance Management System. It’s the English term equivalent to the Spanish GMAO, Gestión del Mantenimiento Asistida por Ordenador.
Are CMMS and GMAO the same thing?
Yes, they’re the same concept in two languages. In Spain both are used interchangeably, and you’ll find products presented as one, the other, or both.
What about an EAM?
An EAM —Enterprise Asset Management— covers the full asset lifecycle, including valuation and investment decisions, not just its maintenance. The line with a full CMMS is blurry, and each vendor places it wherever suits them.
How many pieces of equipment before you need one?
There’s no number. You need one when the symptoms appear: not being able to prove what was done, not knowing what each piece of equipment costs, or depending on two people’s memory. That happens with fifty assets and with five thousand.
Does it replace my ERP?
No. The ERP manages the business and the CMMS manages maintenance. It’s common to integrate them so the hours and materials from an intervention reach invoicing without being typed twice.
Recognize any of these symptoms?
In a short demo we’ll look at your case and whether a CMMS solves what you’re dealing with. If it doesn’t, we’ll tell you.