The Capability Acquisition and Sustainment Group (CASG) supplies, repairs and maintains military equipment for the Australian Defence Force. Funded by Australian taxpayers, it is accountable to the Australian Government.


In 2011, problems with the seaworthiness of Australia’s naval amphibious fleet meant ships were unavailable for disaster response to Cyclone Yasi. The situation led then defence minister Stephen Smith to commission the Rizzo Review. The review found fundamental flaws in the maintenance system, including a lack of communication, information-sharing and transparency between the Navy and CASG.

The review highlighted the Navy and CASG’s need for better coordination and integration of interdependent activities. The two bodies needed a solution to reduce the risk of naval assets being unavailable to serve the Australian people on demand.

Risk management teams from CASG and Navy headquarters collaborated to identify a lateral solution to mitigate the risks of not sharing information.


The solution was the Interdependent Mission Management System (IMMS ) designed by ThoughtWeb, in collaboration with the stakeholders, as an integrated management approach. Its purpose is to align the strategic plans, enterprise risk and service agreements between the Navy and CASG.

ThoughtWeb configured a concept demonstrator over a six-week period in late 2011, which was quickly accepted. The Navy and CASG spent the following five months promoting, testing and refining the prototype. The two bodies provided final approval for IMMS implementation in July 2012 and the system was launched the same month. IMMS is now seamlessly linked to the Navy Strategic Management System, another ThoughtWeb solution.

IMMS manages inherent service agreement risks by highlighting relationships, performance, accountabilities and responsibilities of and between the Navy and CASG. The solution provides all stakeholders with insight into their decision-making and how they prioritise resources to meet operational demands.

IMMS contains all of the Navy’s sustainment information across all its major assets. This gives the Navy the ability to highlight any risks that may be more obvious to the Navy than to CASG, and vice versa. IMMS software links the Navy’s strategic objectives with the responding activities and risk within CASG.

ThoughtWeb enabled Defence to develop a new approach to working in partnerships. The software was configured to provide integrated management, transparency and visibility of sustainment blind spots.


IMMS has changed the way the Navy and CASG view and treat each other. The relationship has changed from that of a customer and service provider into a true partnership.

IMMS delivers awareness of blind spots so those risks can now be identified and managed proactively. The ability of IMMS to provide visible relationships and accountabilities has reduced lead times for escalating issues to the appropriate people.

ThoughtWeb’s software has enabled the Navy and CASG to quickly, accurately and efficiently respond to changes in expectations and needs.


Australian Government Department of Defence – Royal Australian Navy (Navy) and Capability Acquisition and Sustainment Group (CASG)


Interdependent Mission Management System (IMMS)