3D CAD Design of Jewelry Accessories, Determination of Geometrical Features and Characteristics of the Used Material of Precious Metals The development of precious metal jewelry requires very good management in terms of design, material cost, good marketing and advertising, and good market positioning. This includes many aspects that, in the right approach, build a complete system of expensive business. With the development of modern technological means it is possible to prefabricate jewelry models in a computer solid environment in which it is possible to calculate the amount of precious metal material used. The purpose of this study is to develop a system that provides preliminary data on the geometric features of expensive jewelry models while at the same time calculating material costs.

Activitybased Cost Model for Material Extrusion Processes Along the Additive Manufacturing Process Chain The utilization of additive manufacturing (AM) has entailed numerous benefits such as shortened timetomarket, high product innovation and individualization. The application of AM has gained in significance within the automotive industry as it is transferring from a prototype technology to series applications. Besides technological barriers, an approach to estimate cost to set up a business case of an application is crucial. Material extrusion (ME) as an additive process category is theoretically capable of meeting high requirements in industry. Despite various processes belonging to ME, Fused Layer Modeling (FLM) is the only one entrenched. The establishment of pelletbased processes could overcome restrictions for ME. Although there are various cost estimations for AM, a transparent methodology to carry out a profitability analysis between ME processes is missing. In this study, a cost model for ME is developed to estimate occurring cost and cost drivers. Existing cost models are compared regarding their suitability for ME. The final cost model for ME is activitybased and measuring occurring unit cost during the process steps pre, in and postprocessing. The duration of costgenerating activities is considered.