Independent Service Providers (ISPs)

How Semco Maritime selects Shoreline's O&M Simulations to sharpen tender commitments

+3.5 pts

availability headroom found per bid

20 configs

vessel/crew scenarios tested a day

About

Semco Maritime is an international engineering and contracting company operating across conventional energy and offshore renewables, providing offshore wind substations, integrated offshore services, engineering studies and manpower consulting. With offices across Denmark, Germany, Norway, the UK, USA, Singapore, Poland and Qatar, the company supports energy operators across both established and emerging markets.

Industry

Independent Service Providers (ISPs)

Company size

~2,300 employees

Founded

1980 (as an offshore energy business; company origins trace to 1888)

“Shoreline Wind gives us greater transparency into the operational impact of different service strategies. These insights help us make better-informed decisions and support our customers with solutions that improve asset availability, reduce risk, and create long-term value. This further strengthens Semco Maritime’s position as a trusted partner for all offshore wind services, from WTG to OSS.”

Alper Gurpinar

Tender Manager, Renewable Service at Semco Maritime

The Company

Bridging conventional and renewable energy across global markets

Semco Maritime bridges conventional and renewable energy through structured operational practices refined across offshore oil & gas and now applied to offshore wind. As the company's Renewable Service division has grown its tendering activity for O&M contracts, its tender managers have needed a way to translate complex, multi-year maintenance and logistics assumptions into commercially defensible bids — without sacrificing turnaround speed.

The Motivation

From manual cost calculations to defensible, data-backed tender commitments

Bidding for offshore wind O&M contracts means committing to an availability level before a single vessel has sailed. Get the commitment wrong — too conservative, and the bid loses to a competitor; too aggressive, and the contract becomes unprofitable the moment weather or asset reliability doesn't cooperate.

Tender managers have to translate uncertain, multi-year maintenance and logistics assumptions — vessel type, count and speed; crew structure; the failure patterns a given turbine model is likely to generate; port and mobilization logistics; the maintenance campaign window — into a single defensible number, under real time pressure, before the cost calculation stage even begins. Testing every combination by hand or in a spreadsheet means either accepting a shallow view of the options or spending days building bespoke models for a single bid.

The Solution

Scenario-based simulation built for offshore O&M tendering

Semco Maritime's Renewable Service tender team uses Shoreline's O&M Simulations to model and compare maintenance and logistics scenarios before a bid's cost calculation is finalized. The tool allows users to:

Model scheduled maintenance requirements (annual, two-year, three-year and five-year campaigns) alongside corrective maintenance, testing team structures from fully dedicated scheduled and corrective maintenance crews to combined teams
Compare multiple vessel types, counts and speeds — from smaller CTVs to faster or larger vessel classes — to find the most efficient logistics approach for a site's distance and access profile
Cluster historical or estimated fault data by type (remote resets, minor faults, major faults) and upload it into the simulation, so modeled availability reflects realistic failure behavior rather than an idealized schedule
Translate simulation outputs directly into the commercial bid — weighing the cost of a configuration against the sales price uplift a higher availability commitment supports

The Results

Broader scenario coverage, quantified in the bid

Efficient use of tender manager time. Upfront engineering and procurement analysis usually takes at least a couple of days; this feeds into a single day of hands-on scenario testing in Shoreline, where one tender manager can run and compare around 20 vessel and crew configurations.
Measurable availability gains from scenario testing. On one project, testing different vessel, crew and scheduling configurations produced achieved-availability results ranging from 93% up to nearly 96.5% — up to roughly 3 percentage points of headroom, with the exact gain depending on turbine type and project specifics.
Broader scenario coverage. For one project, this meant running around 20 distinct simulations before settling on an approach — a level of coverage not feasible with manual/Excel-based methods.
Realistic, failure-aware planning. Troubleshooting event clustering by fault type means modeled availability accounts for real failure behavior, not just the scheduled maintenance plan.

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