In a manufacturing plant a label printer breaks down. IT technicians are waiting for a report. Maintenance technicians can spend hours fixing it with no visibility for the production manager. In the meantime orders slip and nobody knows when the line will be back up. Chaos. The problem is that CMMS (a system for managing machine servicing) and ITSM (a system for managing IT) are two different worlds - often separated, with no communication between them. In this article I show when to choose CMMS, when ITSM, and when both - with practical guidance for factories from 50 to 500 employees.
What is CMMS and what is it for?
CMMS (Computerized Maintenance Management System) is a system for managing maintenance - servicing, inspections and repairs of production machines. CMMS focuses on physical assets: printers, welding robots, hydraulic systems, compressors.
Main CMMS capabilities:
- Machine catalog - every machine has a history (age, manufacturer, service contract, vulnerabilities).
- Inspection schedule - CMMS reminds you: machine X needs an inspection every 500 operating hours. It is now at 490 hours - inspection in a few days.
- Service tickets - a machine failure means an automatic ticket in CMMS, a thorough description of the problem, history of similar failures.
- Reliability metrics - MTTR (Mean Time To Repair), MTBF (Mean Time Between Failures), machine availability %.
- Cost reports - service cost per machine, planned spare parts.
Popular CMMS systems: SAP PM (module in SAP), Sabrix, eMaint (Dude Solutions), Fiix, IFS Service Management. Most CMMS products come from the manufacturing world and are aimed at machines, not IT.
What is ITSM and how is it different from CMMS?
ITSM (IT Service Management) is a system for managing IT services - help desk for employees, managing incidents (failures of IT systems), changes, problems and IT assets (servers, laptops, software licenses).
ITSM focuses on the availability of IT systems and the satisfaction of IT users. Main capabilities:
- Employee help desk - an employee reports a problem with a laptop, server or the network.
- SLA (Service Level Agreements) - P1 (server down) - max 1 hour to resolution, P3 (problem with no impact) - max 2 days.
- Change Management - managing change: who changes server configuration, whether the change is tested, what the rollback plan is.
- CMDB (Configuration Management Database) - map of IT dependencies: server A depends on server B, laptop X has license Y.
- Reporting and metrics - mean time to resolve, ticket volume per department, user satisfaction (CSAT).
Popular ITSM systems: ManageEngine ServiceDesk Plus, Jira Service Management (Atlassian), Freshservice, ServiceNow, TOPdesk. These were born in the IT world and target infrastructure management.
CMMS vs ITSM comparison table - 10 criteria
Below is a practical comparison based on Rotech Group's experience from manufacturing implementations:
| Criterion | CMMS | ITSM |
|---|---|---|
| Main asset | Production machines (hardware) | IT systems (servers, networks, software) |
| Who uses it | Maintenance team, machine service technicians | IT technicians, IT support, users |
| Ticket type | Service, inspections, repairs (planned and emergency) | Incidents, problems, questions, service requests (reactive) |
| Scheduling | Recurring inspections, maintenance plans months ahead | No native scheduling, everything is an incident |
| Reliability metrics | MTTR, MTBF, availability %, readable for production | MTTR, ticket volume - less about machines, more about tickets |
| Integration with production data | Natural - every machine is a CI (Configuration Item) | Requires work - IT does not think in machine terms |
| Operating cost | Service budget planning for years ahead | Hard to forecast, depends on failure rate |
| Change Management | Changes are planned inspections (no formal CM) | Change Management - every IT change recorded |
| SLA support for production | No native SLA (the line must run all the time) | Advanced SLAs with priorities, escalation |
| Implementation cost | 15-50k PLN for a mid-size factory | 15-45k PLN for a mid-size factory (similar) |
When to choose CMMS, when ITSM, when both?
Choose CMMS if:
- You have an in-house service team (3+ maintenance technicians).
- The machines are expensive and critical for production.
- You need inspection planning months ahead.
- You want to track MTBF and machine availability - production metrics.
- You have periodic service intervals (every 500 hours, every month).
Choose ITSM if:
- IT problem reporting is chaotic (technicians do not know whom to report a failure to).
- You need a help desk for employees - one number/email for failure reports.
- You want SLAs for the production line (P1 - machine down).
- You have changing IT infrastructure (frequent upgrades, migrations).
- You are integrating systems (ERP, WMS) - you need a dependency map.
Choose both (CMMS + ITSM) if:
- A plant of 200+ people with both teams (maintenance and IT).
- Machines have IT components (PLC controllers, power systems).
- You want a full asset picture - machine + IT system on which it runs.
- You have budgeted 50k+ PLN.
Hybrid model: CMMS + ITSM in one plant
More and more factories move to a hybrid model - two systems, linked together. Here is what it looks like in practice:
Scenario: The assembly line is down. A maintenance technician opens a ticket in CMMS (machine X - failure). At the same time ITSM reports that the server powering the PLC controller for machine X is unavailable. That is integration - both systems see the same event from different angles.
Implementing the hybrid model requires:
- REST API between the systems - CMMS pushes an event to ITSM, ITSM pushes a ticket to CMMS.
- A shared asset map (CMDB) - every machine has a CI in the CMDB with links to servers and IT systems.
- A shared dashboard - the production manager sees both machine status and IT status.
- Escalation procedures - if server X goes down, ITSM automatically notifies the maintenance team that machine Y may lose power.
Hybrid model integration is extra time and implementation effort - exact cost depends on the number of systems and integration scope. Main benefit: shorter time to locate the root cause of a failure, because the maintenance and IT teams see the same event from two perspectives instead of working in isolation.
FAQ - CMMS vs ITSM for manufacturing
What is CMMS?
CMMS (Computerized Maintenance Management System) is a system for managing maintenance - servicing, inspections and repairs of production machines. CMMS tracks each machine's history, reminds about inspections, manages working times (MTTR), analyzes reliability. Examples: SAP PM, Sabrix, eMaint, Fiix.
What is ITSM?
ITSM (IT Service Management) is a system for managing IT services - help desk, incident, change, problem management, IT assets (servers, networks, licenses). ITSM focuses on IT system availability and user satisfaction. Examples: ManageEngine ServiceDesk Plus, Jira Service Management, Freshservice.
Can I use both CMMS and ITSM in one factory?
Yes, the hybrid model is increasingly common. CMMS manages production machines (predictable service, schedules), ITSM manages IT (incidents, problems, SLAs). They can be separate or integrated - if CMMS reports a machine failure, it notifies ITSM which escalates to the IT technician (because there is a controller dependency on a server). Integration requires APIs and planning, but gives a full picture of assets and dependencies.
Which system should a small factory choose?
For a factory of up to 50 people - ITSM (for example ManageEngine Free) is enough. For 50-200 people with in-house machines - start with ITSM, and if you have a maintenance team, add CMMS (integration). For 200+ - both systems, integrated. The decision should always start with: who services the machines? If it is external service, you do not need CMMS. If you have an in-house maintenance team, CMMS is worth it.
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