Section 3 Performance requirements

3.1.1 A margin management plan shall be provided which references the Navy margin policy and defines: organisational roles and responsibilities, principles, activities, monitoring, reporting and methods of evaluation.

3.1.2 Design Margins are to be defined for key engineering variables which have the potential to threaten the viability of the submarine design if not adequately managed. Margins may be defined for:

1. Weights and centres (VCG, LCG, TCG);
2. Space;
3. Electrical Power;
4. HVAC System and atmosphere control;
5. Chilled Water; and
6. PMS Bandwidth and processing.

3.2.1 Budgets are to be agreed for the following lifecycle stages and provided with suitable justification.

1. Design;
2. Build;
3. Modification;
4. Growth; and
5. Capability upgrade.

3.2.2 The budgets for systems, equipment and components shall be decomposed to an appropriate level where by the engineering variables can be adequately determined and measured. Responsibility for managing the engineering variables is to be assigned to relevant individuals.

3.2.3 Key systems, equipment and components which have a significant impact on an engineering variable shall be identified and specific monitoring and control measures defined.

3.3.1 Suitable processes are to be established to allow estimates to be made of the engineering variables and to collate accurate information from the supply chain. Information is to be updated with a frequency appropriate to the uncertainty or risk associated with the systems, equipment and components.

3.3.2 Where required specific systems, equipment and components are to be tested to verify the engineering variables.

3.3.3 The estimates and margins are to be reviewed and updated on a regular basis during the design and build phase and reported at key milestones. The estimates and margins are to be reviewed and updated following change or modification of the systems, equipment and components.

3.3.4 The margins are to be measured, reviewed and updated during operation and following change or modification of the submarine.

3.3.5 Information on margin assumptions, growth and changes is to be appropriately captured and stored to inform future projects.