| Summary: | The Helsinki shipyard has in the last few years moved back into the building of ice strengthened vessels. This has also brought new challenges. Building icebreaking specialized vessels and supply vessels is now considered the core competency of the shipyard. Still, creating cost and weight calculations quickly during the early sales project phase is difficult. An indicative but as precise as possible - cost calculation in the earliest possible - phase would make it much easier to create cost calculations as the design process advances. In this thesis the premise is the creation of a concept design tool for an icebreaking supply vessel, with an emphasis on the cost calculation part. The goal of the research is to study if it is possible to develop a tool that is able to create a swift cost and weight indication for a ship concept in the early design phase. The tool is to be based on the System Based Ship Design methodology, where the required areas and volumes of a ship project are calculated independently of the main dimensions and other geometric requirements. The required areas and volumes are the result of system demands that are defined in the system based design process. The preliminary cost and weight indication are derived from this information through the gross volume of the ship. After this, main dimensions are chosen and the rest of the geometry is designed in order to create a hull and a superstructure that facilitate the prerequisites of the system demands. Then, the volume and area requirements of the systems are compared against the designed ship geometry and its capacities, which are then changed accordingly in order to combine the model. The created tool is used to calculate the cost indication for an example vessel, which is then compared against the actual costs of the vessel. The cost calculated by the created tool is 4.51 % higher than the actual cost of the example vessel, which is a reasonably accurate estimate. The shipyard should develop the tool by gathering comparable ship statistics in ...
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