A PMS is only as reliable as the data it is built on. When the equipment register underlying the PMS contains incomplete or incorrect records, the maintenance schedule cannot accurately reflect the actual maintenance requirements of the vessel. The consequences are operational, financial, and regulatory.

The most common PMS data quality problems found on commercial vessels include:

• Equipment not entered in the system — equipment installed on the vessel that does not appear in the CMMS equipment register, and therefore has no associated maintenance tasks, no spare parts linked, and no maintenance history recorded.
• Maintenance intervals not matched to maker requirements — intervals imported from a generic template or entered by crew based on memory, rather than verified against the manufacturer’s maintenance manual for the specific equipment installed.
• Incomplete spare parts links — maintenance tasks in the PMS that do not have the required spare parts correctly linked, forcing technical superintendents and crew to identify parts manually at the time of maintenance.
• Missing or incorrect maker names and part numbers — equipment records with manufacturer information that cannot be used to place a purchase order with the OEM, driving procurement through intermediaries at higher cost and longer lead times.

These problems are common in vessels transferred between technical managers, vessels delivered from shipyards with incomplete commissioning data packages, and fleets that have grown through acquisition of vessels with different CMMS histories.

Building a reliable PMS requires more than populating a CMMS template. It requires verified equipment data — confirmed maker names, correct part numbers, maintenance intervals matched to manufacturer requirements, and spare parts catalogues that reflect what is actually installed on the vessel.

Sharecat Data Services provides expert PMS data services for maritime operators, covering the full scope of data quality work required to build a reliable planned maintenance foundation. This includes equipment register construction and verification, maintenance interval verification against manufacturer manuals and class society requirements, spare parts catalogue enrichment with verified part numbers and quantities, and CMMS data migration support for operators moving between maritime CMMS platforms.

Every engagement is supported by Sharecat Data Services’ proprietary reference database of approximately one million verified manufacturer names, part numbers, and model numbers — enabling cross-checking and enrichment of PMS data at scale. All corrected data is delivered in the exact format required for direct loading into AMOS, ShipNet, STAR Suite, or any other maritime CMMS.