OMS vs CMMS vs CAFM: What Is the Difference?
A CMMS (computerized maintenance management system) manages maintenance work: assets, work orders, preventive maintenance schedules and spare parts. An OMS (operations and maintenance management system) includes those CMMS functions and extends them to wider operations, such as contracts and budgets, projects, service-provider evaluation, quality indicators and cross-site benchmarking.
Side-by-side comparison
| Capability | Typical CMMS | OMS |
|---|---|---|
| Asset register and history | Yes | Yes |
| Work requests and work orders | Yes | Yes |
| Preventive maintenance scheduling | Yes | Yes |
| Spare parts and inventory | Usually | Yes, with purchasing and supplier KPIs |
| Operating contracts and contract budgets | Rarely | Yes |
| Projects and installation planning | Rarely | Yes |
| Service-provider and employee evaluation | Limited | Yes |
| Multi-site dashboards and benchmarking | Varies | Yes |
When is a CMMS enough?
A CMMS is often enough for a single site whose main goal is to organize maintenance jobs and PM schedules.
When do you need an OMS?
An OMS fits organizations that run many sites or contracts, rely on subcontractors, or need management reporting that links maintenance with cost, quality and operational performance. Facility management companies, healthcare clusters and multi-plant industrial groups are typical examples.
What is CAFM, and how does it compare?
CAFM (computer-aided facility management) software manages facilities: spaces and occupancy, buildings, services and, often, maintenance requests. It overlaps with both CMMS and OMS.
| Dimension | CMMS | CAFM | OMS |
|---|---|---|---|
| Main focus | Maintenance execution | Facilities and space | Maintenance plus operations |
| Work orders and preventive maintenance | Core | Often included | Core |
| Spaces and occupancy | Rarely | Core | Varies by product |
| Contracts and subcontractors | Rarely | Varies | Core |
| Typical user | Maintenance department | Facility management team | Multi-site operators and service companies |
Which one fits your organization?
- A single site that mainly needs organized maintenance jobs: a CMMS.
- A real-estate or facilities team focused on space and occupancy: a CAFM.
- An organization running many sites, contracts or subcontractors that needs maintenance, cost and performance in one place: an OMS.
Where Steady OMS fits
Steady OMS covers the CMMS core (assets, work orders, preventive maintenance and spare parts) and the operations layer (contracts, subcontractors, evaluations and KPIs across sites). It also includes CAFM functions such as a location hierarchy from site to room and, in the OMS Exp plan, interactive space maps. See Steady OMS for facility management and CAFM.
Frequently asked questions
Yes. Steady OMS provides CMMS functions such as assets, work orders, preventive maintenance and stock control, and adds broader operations management features.
Yes. Steady OMS is available in Plus, Prof and Exp plans, so organizations can start with the maintenance core and add modules as they grow.
CAFM (computer-aided facility management) software manages facilities: spaces and occupancy, buildings and services, often together with maintenance requests.
Yes, for the facility side of maintenance: a location hierarchy from site to room, work requests across buildings and, in the OMS Exp plan, interactive space maps showing work orders, assets and occupancy per area.
Talk to Steady Solutions
Tell us about your sites, assets and processes, and our team will show you how Steady OMS fits your organization. You can also contact us directly or call +966 55 353 3314.