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During the early stages of ship design a set of requirements needs to be identified, accounting for financial and technical feasibility, and operational effectiveness. This process of requirements elucidation creates a need for information regarding various design alternatives and their effect on the feasibility and effectiveness of the design requirements. When one considers internal layout and process driven ships, ships where the arrangement of spaces has a strong influence on the effectiveness of the ship's operational processes, a gap in available methods has been identified. This paper proposes a method based on queueing networks that allows a naval architect to study the effects of different arrangements on the execution of various sets of operational processes. Using this model a better understanding of the interaction between the ship's arrangement and its operational processes can be obtained. This understanding can improve the requirements elucidation process and can lead to the development of better design requirements.

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Concept Exploration Models (CEM) are powerful tools in the conceptual design phase, triggering naval architects towards unconventional or better solutions. However, the quality of the design-set depends on the evaluation of each concept design and its compliance to customer requirements. To improve design-set quality new evaluation-modules are developed to calculate sea-keeping, weight, and resistance and evaluate their compliance with requirements set by the U.S. Coast Guard. To make this possible the MATLAB based CEM was coupled with the sea-keeping program Shipmo2000 from the Marin Research Institute. In a final step the designs were graphically filtered and evaluated.