A Computerized Maintenance Management System (CMMS) is a software application designed to organize, schedule, and track maintenance activities for physical assets. In the maritime context, a CMMS manages the maintenance of all shipboard equipment — propulsion systems, auxiliary machinery, deck equipment, navigation electronics, safety appliances, and hull structures. The system serves as the central repository for equipment records, maintenance procedures, work order history, and spare parts inventories.
How Maritime CMMS Differs from Industrial CMMS
While the core principles of maintenance management are universal, maritime CMMS platforms must address challenges that land-based industrial systems do not face. Ships operate with intermittent or low-bandwidth internet connectivity, so a maritime CMMS must support robust offline operation and intelligent data synchronization when connectivity is restored. The equipment hierarchy follows vessel-specific conventions rather than plant-floor layouts, typically organized by vessel, system, subsystem, and component. Integration with classification society survey schedules is essential — overdue class-related maintenance items can lead to vessel detentions. And every maintenance activity must be traceable under the ISM Code, meaning the CMMS doubles as a compliance documentation tool.
CMMS vs. PMS
In maritime terminology, the terms CMMS and PMS (Planned Maintenance System) are often used interchangeably, though there is a subtle distinction. A PMS traditionally focused narrowly on scheduling planned maintenance jobs at fixed intervals. A CMMS encompasses a broader scope — including corrective (breakdown) maintenance, condition-based maintenance, spare parts management, purchasing integration, and analytics. In practice, modern maritime maintenance platforms combine both capabilities. Typical features include hierarchical equipment trees, calendar-based and running-hour-based job triggers, work order workflows with approval chains, spare parts catalogs linked to equipment, and dashboards showing maintenance KPIs such as overdue job counts and mean time between failures.