The aim of this research is to create a yacht design for Feadship between 50 and 60 metres that will reduce costs and maintain the customer value. To do so, first, existing yachts are analysed to determine the requirements for the design. Second, an analysis is made of the engineering hours spend on a yacht in this range. Lastly, the engineering process is analysed to determine how the different processes affect the customer value. These three parts form the basis for the design of a modular product platform. The platform is optimised to reduce engineering hours by reusing parts of the design with little customer value and high engineering costs. The result is three platforms and eleven modules to offer the client enough customisation and still reduce the engineering costs. This thesis is made at De Voogt Naval Architects part of the Feadship group.