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Class Plan Scheduling


A review of submarine maintenance practices conducted by the Director General Maritime Equipment Program Management (DGMEPM) under the Submarine Maintenance and Operational Cycle Alignment and Rationalization (SUBMOAR) project determined that efficiencies could be achieved by adjusting the Operational Profile of the Class in conjunction with the realignment of maintenance routines.

In order to transition the Victoria Class Submarine to the new operational profile, an in-depth analysis of the proposed changes along with a simulation of the long term implications of the modifications on operational availability, performance and resource demands was required. Traditional methods of analyzing the interrelationships between elements within a complex resource constrained environment are both time consuming and extremely difficult to capture with any degree of reliability and consistency making optimisation challenging to effectively manage.


Babcock Canada together with the Canadian Department of National Defence (DND), with considerable experience gained from the Royal Australian Navy, have developed a scheduling model for the Victoria Class Submarine that combines a variety of infrastructure and human resources to create a projection of resource demand against the Class, through to its end of life.

The operational profile is built in a powerful scheduling tool. This allows the complex rules, governing the programing of maintenance to support the licencing requirements of deep diving submarine material certification, to be upheld while optimizing resources, ensuring value for money. The resulting schedule is then subjected to a Monte Carlo simulation that uses inputs of risks from the Supportability, Reliability, Availability and Maintainability (SRAM) toolset (also under development by Babcock Canada) with the aim of producing a realistic and achievable class plan. Visualization and presentation of the toolset’s outputs are achieved through a selection of interactive mediums that allow quick and easy dissemination and interrogation of the results, including ‘what-if’ scenario analyses.


The implementation of the Class Planning toolset has provided DND’s Submarine Program Management Office the flexibility to quickly assess a number of scenarios based on resource constraints such as dock availability and maintenance manpower to determine an appropriate course of management action with a thorough understanding of the associated risks and long–term Class availability implications. As a result of applying the toolset, DND’s submarine enterprise has experienced increased confidence, improved consistency and a more informed decision making processes in support of Complex Asset Management.


The images shown are examples of some of the interactive tools developed as outputs of the Class Planning project.

Image 1

Image 1 shows the interactive Class Plan that features the ability to select a maintenance period and gain standard project data such as start and finish dates, facility, maintenance load, capability insertion as well as hyperlinks to collaborative project sites.

Image 2

Image 2 is an example of the presentation of the 10 year maintenance schedule for the Victoria Class with a loading histogram along the bottom showing facility utilization. This is used to determine periods of overloading and resource smoothing.

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Keith Cunnane
Keith Cunnane

Vice President, Marine