Section 3 Design verification

3.1.1 Design Verification is to establish that the design of the submarine satisfies the applicable project specifications, Rules, Codes and standards previously verified and considered acceptable solutions during Standards Justification.

3.1.2 The approach to verification documented in the Design Verification Plan is to be agreed between the submarine designer and LR prior to any verification activity and in accordance with the Submarine Assurance Plan.

3.1.3 The scope of verification to be carried out by LR and the roles of the entities involved is to be in accordance with the Submarine Assurance Plan.

3.1.4 Arrangements for accessing design related information and allowing comparison between the design related information and documentation and the project specifications, Rules Codes and standards are to be provided.

3.1.5 Arrangements for verification of the Operational envelope following design and prior to construction of the submarine and following construction of the submarine are to be agreed.

3.1.6 Arrangements for managing non-compliances in accordance with their categorisation are to be agreed. The impact of non-compliances is to be established.

3.1.7 Arrangements for reporting the results of verification activities are to be defined.

3.1.8 Verification is to confirm that the Design Verification Plan is consistent with the Standards Plan and Justification Document following any revision necessary as a result of the Standards Verification process.

3.1.9 Verification is to confirm that the design of the submarine satisfies the applicable project specifications, Rules, Codes and standards previously verified and considered acceptable solutions during Standards Justification.

3.1.10 Verification is to be carried out at key stages in the design of the submarine including Concept Design, Initial Design and Detailed Design as appropriate and is to include review of the following information as appropriate:

1. Technical documentation describing the design of the submarine;
2. Systems engineering policy, processes and application;
3. Human factors policy, processes and application;
4. Design and manufacturing policy and processes and application;
5. Quality assurance policy, processes and application;
6. Transverse requirements;
7. Hazard identification and risk assessment studies;
8. Engineering and safety justifications; and
9. Calculations, analyses, modelling and testing reports.

3.1.11 Review of information is to establish that:

1. Organisations carrying out calculations, analyses, modelling or testing are competent;
2. Scope of calculation, analysis, modelling or testing is sufficient;
3. Assumptions made in the calculations, analyses, modelling or testing are valid;
4. Design constraints are adequately defined and assessed;
5. Calculation, analyses, modelling or testing is appropriate and of sufficient depth and rigor;
6. Calculation, analyses or modelling tools have been validated;
7. Testing equipment is calibrated;
8. Results and analysis are appropriately recorded; and
9. Analyses, calculation, modelling or test results are reasonable.

3.1.12 Verification is to confirm that appropriate requirements have been established for system, equipment and component; reliability, availability and maintainability.

3.1.13 Verification is to take account of relevant hazard assessment and risk assessment studies.

3.1.14 Verification is to take account of Whole Boat requirements.

3.1.15 Verification activities are to be appropriate for the safety criticality category of the submarine system, equipment or component.

3.1.16 Verification activities are to include a combination of Internal Review, Design Review, Design Audit, Design Appraisal, Independent Analysis, Modelling, Testing or assessment of relevant in-service experience.

3.1.17 Where in-service experience is proposed as evidence of suitability, the in-service experience is to be sufficiently representative and include operation under normal, abnormal and emergency operating conditions.

3.1.18 Revisions to the design are to be controlled and assessed for their impact on on-going or scheduled verification activities. On-going or scheduled verification activities are to be revised where necessary in accordance with the requirements of the Design Verification Plan.

3.1.19 LR is to be advised of modifications undertaken during the design of the submarine. Design modifications are to be evaluated for any impact on the System Design Description, the System Operational Concept and ultimately the Concept of Operations. The Design Verification Plan and where appropriate the Submarine Assurance Plan are to be updated and re-verification carried out as necessary.

3.1.20 Verification is to confirm that the submarine Operational envelope correctly reflects operating constraints.