DEVELOPMENT OF INTEGRATED METHODOLOGY FOR RISK BASED DECISION MAKING USING EXPERT OPINION FRAMEWORK OF MOBILE MOORING SYSTEM

Floating structures use mooring system for station keeping in any water depths.
Mooring system is a vital component for the safety of floating structures. Mooring
accidents can cause serious injury or damage to the vessel, and hence it is necessary to
establish a systematic risk-based decision making method to minimize the risk failure.
This study uses the mobile mooring system of a semi submersible pipe laying barge as
a case study. The risk approaches used in this study consist of HAZOP (Hazard and
Operability), FTA (Fault Tree Analysis), ETA (Event Tree Analysis) and AHP
(Analytic Hierarchy Process). The reason why these method have been chosen as risk
methods used in this study are because of their comprehensive, systematic and
rigorous approach compare to other methods such as Checklist, FMEA and SWIFT.
The benefits by using these methods are that methods can be integrated into MIVTA
(Methodology for Investigation of Critical Hazards) and MIRBA (Methodology for
Investigation of Risk Based Maintenance). MIVTA and MIRBA are comprehensive
risk based decision making consists of risk identification, risk assessment, risk
mitigation and risk based maintenance.