High Complexity Modelling

We have 2 versions of ESOX: ESOX+ is our advanced, flexible Matlab-based tool run by our internal staff for high complexity modelling, and ESOX is our user friendly, simplified Excel based version available as freeware from this website.

ESOX+ is fully customizable, enabling tailor-made simulation models. Since 2015, Lautec has undertaken modelling using ESOX+ for more than 5 GW of offshore wind capacity across North America, Europe, Asia and Oceania.

One Tool, Two Versions

Automated generation of a task list for cycle-based work campaigns
Manual editing of individual tasks in the auto-generated task list
Multi-variable constraints
Learning curve modelling
Generate weather calendars for P6 and MSP
Milestone completion statistics
Root cause analysis
Annual campaign simulation for each reanalysis year
Global ERA5 metocean time series data
Full log of simulation steps for validation of results
Any number and type of time series data available or derivable
Parallel, interdependent activity streams
Shared inventory modelling
Shared resource modelling
Interdependent workability limits (e.g. wave period/height plots)
Weather window requirements with non-constant limits
Advanced root cause analysis

Unlock the Full Potential of Your Installation Setup

Visualize the root cause for downtime, identify the bottlenecks and optimize your construction setup accordingly.


Evaluate Storage Area Size

Dimension your storage capacity by modelling the in- and out-bound logistics. Will the installation vessels run out of components in a P30 scenario? What is probability that the storage capacity limit will be reached, stopping the in-bound logistics?

(A) Risk of storage at max capacity (12 WGTs). Inbound logistics on standby until the next load-out of components.

(B) Risk of running out of WTGs at staging port. Coupling of load-out activities and storage level.


Interdependent Workability Criteria

Model interdependent operational constraints e.g. floating operations with inter-dependent wave period and wave height.

Fixed, individual limits on wave height and wave period leads to overly conservative downtime estimates. Identify all workable periods by modelling the correct Hs-Tp curves instead .

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Send Us a Challenge

Contact our specialists directly or send a general inquiry.

ESOX+ Implementation Case

Project: Supporting a +500MW offshore wind project in the US Atlantic Coast by analyzing the transport and installation options.

Challenges: The logistic options including several vessels feeding components from different harbours to a main installation vessel located at the offshore site. The following questions arised:

  • How do the feeder vessels’ performance impact the construction schedule?
  • How many feeder vessels are needed in order to keep the main installation vessel busy?
  • What does the port in-/outbound logistics look like?
  • Will the rate of inbound components be sufficient?
  • Will the port storage be able to accommodate all components during the installation program?
  • How would alternative port locations impact the installation program?

Outcome: Lautec helped to answer these questions in detail by implementing the case data in ESOX+ combining the modelling of parallel activity streams, shared inventory modelling, shared ressource modelling, interdependent workability limits, weather window requirement with non-constant limits and detailed root cause analysis.