The introductory part of the paper describes all the main goals and the principles to be obeyed at the time of constructing a new product. Advantages and disadvantages of the design have been pointed out and a review of intellectual property and the laws of industrial design has been done. Basic design styles and primary elements to be applied in developing interior elements have been shown. A detailed description of basic materials used in interior design and designing new products has been provided. The basic features and the characteristics of materials have been shown, and the importance of knowing their advantages as well as their disadvantages has been pointed out. The way in which their improvement affects upgrading and further development of structures has been demonstrated. The impact of modern research on progress in the area of materials has been shown which ultimately leads to product development. Conventional and unconventional technologies of production which help to achieve basic construction of products applied in interior design have been specified. A description has been given of their basic functions on which the technology is based, as well as the way in which they affect the creation of the desired elements. It has been specified in which case they are applied and with what materials it is possible to produce them. Basic advantages and flaws in the sense of characteristic features and efficiency have been defined, which makes the choice of a specific technology of production for a specific product easier. Basic techniques have been presented by which it is possible to put together the produced elements in construction systems in a resolvable and an unresolvable manner. Key characteristics of a specific technology of joining elements have been explained and their application in reference to options has been given. The basic aspects and application principles of final elements have been given. The method has been described in more detail, and key items affected by it, as well as the contribution it made in reference to faster product development have been presented. By improving and upgrading theoretical principles of this method by its application through automation and by introducing software its specific impact has been shown. The meaning of the terms rendering and visualisation has been described, as well as the way in which they made the presentation of constructed models in a real environment easier. The process and the steps that need to be taken to ultimately get a picture of a constructed product in a designed interior or exterior have been described in more detail. Doris Stavljenić Diplomski rad A comparison has been made of all the software packages used in this paper to analyse the constructed elements. A detailed description has been given of their function and the basic features that set them apart from each other. The basic advantages of each of them have been stated precisely and the stated improvements point towards further development and their specialisation. A conclusion obtained by comparing all the features as well as the advantages and the disadvantages of the stated programmes has been added. Moving away from the theoretical part of the paper, the practical part offers an insight into the conducted optimization of the interior elements. The elements included in the optimization process include a shelf, a chair, an armchair, a bathroom vanity, a frame, and a table. The analysis started by a preliminary design and the construction of a certain element, together with the choice of material. In the second stage a static or a dynamic analysis started, as well as the evaluation of the calculated value data. In the final stage of the project an overview of the real environment of the constructed element was created. This procedure provided a visual display of an element and the way to make it fit into a designed interior. This kind of procedure was conducted by creating a 3D visualisation which provides a realistic display and facilitates an image of the created design in real space. Programmes including OnShape, Ansys, V-ray and SketchUp were used to carry out the entire optimization of interior design. In the end of the paper a key conclusion way made which was adopted based on all the theoretical and practical skills acquired in the process of creating the paper and the construction orientation of the master’s course.