Offshore Wind vessel mobilisation Step-by-Step Guide

Project scope definition is the first and most critical step in offshore wind vessel mobilisation. Before starting an offshore wind vessel mobilisation, a clear and detailed project scope definition is required.

Inadequate scope definition, indecisiveness and last-minute scope changes are primary drivers for budget overruns, schedule delays and safety incidents. Poorly defined scope results in teams working towards different objectives, while indecisiveness can lead to technical errors, delays due to missing resources or materials, and reduced team effectiveness.Last-minute scope changes are often assessed for their impact on budget and schedule, but the logistical and technical implications are frequently underestimated. Such changes can result in impractical deck layouts, unreliable temporary systems, negative impact on the offshore installation cycle and, in some cases, safety incidents.

The project scope definition should clearly describe what is to be designed, fabricated and mobilised, including the type of vessel and equipment involved, applicable marine warranty survey (MWS) requirements, and the intended duration of equipment use. Mobilisation readiness dates, mobilisation milestones and project milestones should be defined, together with the project budget and cost exposure in case of delays, such as liquidated damages.

Responsibilities for basic and detailed design, design decision authority, required deliverables for the client and MWS, and expectations towards suppliers should be explicitly documented.

Although budget and key milestones are often predefined, their feasibility should be critically assessed. Any concerns regarding the realism of these targets should be identified and addressed as soon as possible.