Probabilistic downtime analysis for complex marine projects: Development of a modular Markov model that generates binary workability sequences for sequential marine operations

A complex marine project consist of series of operations, with each operation subject to a predefined operational limit and duration, depending on the equipment being used. If actual weather conditions exceed the operational limit, then the operation cannot be executed and hence downtime occurs. It is up to contractors, such as Boskalis, to...

Probabilistic downtime analysis for complex marine projects: A state-of-the-art model based on Markov theory to generate binary workability sequences for sequential operations

A marine operations encounters downtime if its operational limit is exceeded during project execution. Accurate information about the expected downtime during a marine project is important information in the tender phase of such a project. The purpose of this thesis is therefore to give insight in the available methods for downtime analysis in...

Project Specific Vessel Motion Based Abandonment Criteria

When harsh weather conditions are expected during an offshore pipeline operation, the decision to start the abandonment procedure has to be taken based on pipeline integrity limits. The pipeline integrity which is analysed by a maximum design sea state does not correspond to the situation offshore, because sea states always occur in a different...