Preferred solution, K12 – Appendix R - Risk assessment

Abstract

Appendix R, Risk Assessments describes the risk management process applied for concept development and assessment of the four concepts K11 to K14. The objectives of the risk management process can be considered threefold:

• An optimization of design choices and construction methods for each of the four concepts to achieve a balanced risk profile and identify mitigations that can secure budget/schedule and minimize risk of violating rules and regulations. • A comparative risk assessment to identify and highlight inherent differences between concepts to be used for concept evaluation and selection of preferred concept. • An assessment of preferred concept to identify and highlight strength and weaknesses as well as mitigation measures for this and coming phases.

The assessment is carried out for both risks related to the construction and installation phase as well as risk related to the operational phase. The resulting risk ranking is part of the overall concept evaluation.

Concept evaluations are given for both construction and operation and a resulting overall concept evaluation is presented based in the assessed significance of construction and operation risks.

Comparative risk assessments conclude K12 to be the preferred concept and in addition the most robust concept.

A specific risk assessment for the preferred concept K12 is undertaken to outline the weaknesses and on this basis give input to the design and the construction and installation methods in terms of identified risk mitigations for the significant risks in construction as well as operational phases.

The resulting risk registers for the preferred concept are presented along with an evaluation of the obtained result.

Evaluation of risks considering construction as well as the permanent situation for the floating bridge over Bjørnafjord shows that even though a number of significant risks are and generally will be part of such a project, there is identified no showstoppers for concept K12. Thus, the concept seems robust from a construction and an operational point of view.