CMMS or EAM: which one you actually need

A CMMS manages maintenance work. An EAM manages assets across their whole life, from purchase through to disposal, with the maintenance work as one chapter of that story. Every other difference you will read about follows from those two sentences.

Where the line really sits

Both systems hold a list of equipment. Both raise jobs against it. The difference is what happens at the two ends of an asset’s life, which a CMMS mostly ignores and an EAM is built for.

• •Purchase and commissioning: what it cost, what the warranty covers, when it went into service
• •Depreciation and book value, in a form finance will accept
• •Total cost of ownership across repair, energy, downtime and parts
• •Replace-or-repair decisions with the numbers to defend them
• •Disposal, and what happened to the asset afterwards

Four questions that settle it

Answer these honestly. Three or more "yes" answers and you are looking at an EAM problem. Fewer, and a CMMS will do the job for less money and less trouble.

• •Does finance need asset values out of this system, not just costs?
• •Do you make capital replacement cases that have to survive a board meeting?
• •Do you own assets with a useful life over twenty years, like plant, pipework or vehicles in the hundreds?
• •Do you need the purchase and disposal record in the same place as the repair record?

The trap in the middle

EAM products are heavier. They ask for more data before they give anything back, and they are usually sold with an implementation partner and a project plan measured in quarters. That is fine when the asset base justifies it. It is a disaster when a team of six wanted their work orders on a phone.

The common failure is buying EAM ambition and getting CMMS value out of it two years later, having spent the difference. If nobody can name the asset-life question they are trying to answer, the answer is a CMMS.

The practical middle ground

Most facility teams need one thing from the EAM side and nothing else: a defensible replacement forecast. You can get that from good condition data and an age-and-cost record in a CMMS, without buying the rest of the category. Start there. Move up if the forecast is the thing that keeps failing.