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Conference programme 

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Poster session

Lead Session Chair:
Stephan Barth, Managing Director, ForWind - Center for Wind Energy Research, Germany
Gerbert Heijkoop Systems Navigator, The Netherlands
Gerbert Heijkoop (1) F P
(1) Systems Navigator, Delft, The Netherlands

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Presenter's biography

Biographies are supplied directly by presenters at OFFSHORE 2015 and are published here unedited

Mr. Heijkoop is working in the offshore wind industry since 2011 when he got involved in logistics planning for the Walney 2 project. He currently runs the offshore business development department at Systems Navigator; a Netherlands based company that specializes in model-based planning services and solutions. He studied System Engineering, Policy Analysis and Management at the Technical University in Delft. Since 2011 he led the development of logistics optimization tools for offshore wind installation projects using simulation technology. These tools focus on integrated analysis of supply chain taking into account complexities such as weather, tidal, operational and resource constraints.


Integrated mitigation of weather risks for optimized installation


Weather risks in offshore wind projects can delay project planning significantly as it impacts almost all operations. And this risk continues to complicate installation operations because projects tend to move further offshore into deeper waters, requiring longer cycle times. The lack of understanding by contractors on how to take weather risks into account in project planning, as well as the large number of interfaces in installation projects due to different contracts and sub contracts, make installation project planning today extremely volatile. This translates itself into long potential project delays and substantial higher cost in the project.


Without understanding the weather risk, creating a reliable financial analysis on a project is difficult, because first power dates and the cost of installation are hard to predict. As a result this leads to higher cost of financing and project cost in general.
It is impossible to predict the exact weather behavior during installation operations in an early stage. However the expected impact of weather in the project can be analyzed using specific technologies, resulting in reliable risk information for project planning.

Main body of abstract

To understand the risk of weather for the complete installation project, an integrated approach on the weather risk is required including all relevant sub contracts that impact the total project throughput. For example the weather delays on substructure installation operations will impact the installation of towers, which will then impact the installation of turbines.
This integrated analysis can be applied using a developed standardized method in which contractors can analyze individual performance with regard to weather. The method uses raw hind cast metocean data in combination with operational parameters and thresholds to analyze the expected completion date of the contract. Instead of having one single completion date, the system generates a bandwidth in which project completion will be expected, because the exact weather pattern cannot be forecasted. Having this bandwidth provides useful weather risk information on the project progress. By using the information, subsequent installation operations as well as other contracts can be analyzed resulting in integrated project planning. The weather risk information format is standardized enabling subsequent contractors to quickly use this information as a starting point for individual analysis.


Based on the results, contractors and developers can design contingency strategies for different weather scenarios ensuring their teams can anticipate to guarantee project progress. This results in reliable integrated project planning with a sound understanding of weather risks in relation to contract interfaces in the project. Understanding the weather risk will enable contractors to actively manage the risk rather than accepting it in return for a fixed price. This leads to a reduction of the overall project cost and eventually drives down cost of wind energy.

Learning objectives
Gain an understanding on better approaches to analyze weather risks in installation projects
Understand how project interfaces can best be managed with regard to weather risks
Learn how weather risk analysis information can be turned into contingency plans for optimized installation