Planned Maintenance System (PMS)
"A paper or software-based system that allows shipowners and operators to carry out maintenance at scheduled intervals according to manufacturer and classification society requirements."
Definition
A Planned Maintenance System (PMS) is a comprehensive schedule of maintenance tasks required for the safe and efficient operation of a vessel's machinery and hull. Originally paper-based card systems, modern PMS are sophisticated software platforms that track running hours, manage spare parts inventory, and generate work orders.
Regulatory Requirement
The International Safety Management (ISM) Code requires every vessel to have a maintenance system in place. This ensures that critical equipment is maintained to prevent failure that could lead to hazardous situations. Classification societies also require a well-documented PMS for survey crediting.
Key Components
- Asset Registry: A hierarchical list of all machinery on board (e.g., Main Engine -> Cylinder Head -> Exhaust Valve).
- Maintenance Schedule: Jobs defined by calendar intervals (weekly, monthly) or running hours (500h, 1000h).
- Job Descritpions: Detailed instructions on how to perform the maintenance tasks.
- History & Reporting: a record of completed jobs, measurements taken, and parts consumed.
Evolution
Modern PMS are increasingly integrating with IoT and Data Logging systems to automate the updating of running hours, reducing manual workload and improving data accuracy.