Managing the costs of a product life cycle, which is performed at the stage of its development, has a dominant influence on achieving and maintaining the competitiveness of the product in the market and the target profit as the primary production goal. Development is of crucial importance in the product life cycle, because evaluating individual solutions for the new product's conceptual and preliminary design based on the simulation of costs of all stages of its life cycle represents the way of ensuring the design requirements for excellence. This paper presents in detail the setting and development of a hybrid model of product life cycle cost management, based on fuzzy neural networks. INTRODUCTIONLife cycle cost management begins at the stage of product development. It is the stage of selection and choice of ideas and evaluation of individual solutions in the process of conceptual and preliminary design [1], i.e. product design development in accordance with the functional and other requirements of the new product on one hand, and comprehensive analysis of competitive products on the market on the other [2].Development hugely affects the costs of individual stages of product life cycle, particularly the production costs [3], because errors arising at the stage of conceptual and preliminary design can increase production costs by as much as 60 %. Therefore, all aspects of costs of production, use and recycling, including the aspects of the total cost of the product should be taken into account as early as the stage of development.In the modern environment, developing a new product emerges as a result of the work of a competent design team, usually organized on the concept of simultaneous engineering. It involves reaching a solution which is suitable for all stages of the life cycle, from development to recycling. Supporting such a design is based on the use of DFX tools intended for excellence in design [4].Instruments of strategic cost management related to the cost of the product include cost management in all stages of its life cycle by comparing the costs of the observed product with the costs of the most important competitors. Comparing the product's cost (Cost Benchmarking) with the costs of the most important competitors as the instrument of strategic and operational management enables identifying strengths and weaknesses of the own enterprise in comparison with competition, which determines directions and development strategies of addressing the identified weaknesses. LITERATURE REVIEWThere are many traditional and modern methods which can be used to assess the life cycle costs of a new or improved product in the part of the development stage that refers to the Todic, Cosic, Maksimovic, Tasic, Radakovic: Model for Simulation of Life Cycle Costs at … 109 choice and selection of ideas for a new or improved product, as well as in the assessment of variations in the product's conceptual solutions [5].Papers presenting a variety of cost assessment methods and models in the last five to six years can...

This study deals with the selection of the cutting process using the grey fuzzy relation approach. The analysis was performed using plasma arc machining, laser beam machining, and abrasive waterjet machining on three different workpiece thicknesses with different cutting speeds. The objective was to select the best cutting process considering several performance characteristics such as machining time, dimensional accuracy, kerf width, and surface roughness. Data normalization, grey relation coefficients, fuzzy inference system, and grey fuzzy relation grade are used to evaluate the machining performances of the machining processes. The developed fuzzy model can be used to study the effects of different cutting processes on technological features. The results show that the grey fuzzy technique can be effectively used for the analysis and selection of cutting processes.

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Strategic planning is the choice of strategy that determines the direction of enterprise development and achieving the set goals. The adopted vision and mission of the realization of the strategic planning process should be based on the possibilities of the company's potential and its focus on both innovation and creative thinking of employees. The analysis of the strategic position of the company and the creation of strategic planning of its development can be done by applying various methods, including SWOT analysis, which is presented in detail in the paper. In the observed company, which deals with Cold and Hot vegetable processing, using SWOT analysis, an assessment of its market position was made and strategic directions in the market were defined, including proposed improvements in strategic planning.

U pojedinačnoj i maloserijskoj proizvodnji, koja se najčešće realizuje u vidu uslužne delatnosti malih i srednjih preduzeća, od posebnog je značaja efikasna izrada ponuda za proizvodnju proizvoda prema zahtevu kupca. Kalkulacija troškova, je osnovni zadatak koji se rešava u izradi odgovarajuće ponude. Osim tradicionalnih metoda, kalkulacija troškova proizvoda vrši se primenom savremenih metoda i modela, baziranih na osnovama veštačke inteligencije. U radu se prikazuje model kalkulacije troškova proizvoda, koji je baziran na principima grupne tehnologije i primeni veštačkih neuroonskih mreža (VNM).