Marine Machinery Condition Based Maintenance

The world of the marine engineer is changing and instead of maintaining machines best practice is to maintain reliability. What I mean by this is that the act of maintenance has traditionally been one based upon the performance of tasks at predetermined intervals. These would vary in scale from simple checks and cleaning to performing a full strip down for overhaul and component renewal. Therefore the required skill was to be able to understand how to perform these tasks and return the machine successfully  into service.As a result of improvements in design and a tendency to reduce the need for running repairs, there has been an increase in the use of throwaway components, e.g. sealed for life bearings. Coupled with the ever present need to operate at reduced  cost means that more often nowadays the engineer is tasked with developing strategies to understand and react to condition thus avoiding or extending scheduled intervals of intervention until necessary. This approach is broadly described as a risk based approach. The engineer is now not maintaining the machine but maintaining the reliability of the machine.

The question to be answered is whether the emerging technologies and practices  can be adequately implemented using staff who’s training is based upon traditional engineering principles when what is required is different. Not that engineers are not competent or sufficiently skilled to adapt, but whether the companies who employ them have developed and matured sufficiently to allow them to work in a different way.

Maintenance handbooks produced by manufacturers must by definition stipulate activities for every end user to reach an acceptable degree of reliability. This means that in the main most machines MUST be either over maintained or being maintained in a way that relieves  the manufacturer of any liability in the event of a failure within the period of guarantee. Even when machines are in service beyond the traditional period for which guarantees are in place, in the event of a failure sufficiently significant to invoke the need for a claims or loss adjustment exercise, the company in question will find itself at higher risk of penalty due to reduced cover.

This the employed skills, the company culture and the risk protection devices are misaligned when compared to industry best practice. It is easier to employ traditional and hence sub-optimal methods to maintain machines in the marine industry.


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