Complex customer requirements (CR) enforce the companies to make cheaper products with better performances on the global market in the shortest time. In that sense, a large number of the companies try to improve their products through anew, variable, innovative or adaptive design. However, old fashion sequential approach to product development is avoiding today. Modern product development concept is based on the product as a technical system. Such a development demands integrated solution and logistic approach through whole product life cycle. Therefore, it is necessary to map specified customer requirements on the particular design parameters (DP). This is arbitrary for the success of the product on the global market. Developed model in this paper connects the product as a technical system and designer as the member of the development team in the environment. Proposed decision-making model based on the mathematical formalisms analyses the acceptability level of n variant solutions (VS) related to CR as functional requirements (FR) by two different grading models. It is possible to estimate the level of the fulfilment of particular DP for any variant solution referred to different hierarchic structures of the evaluators team. One team of evaluators is organised on the centralised model and the second is based on the antagonistic approach. Through this analysis is it possible to rank particular variant solutions and determinate which solution is most acceptable comparing to CR. This model presents how to map CR via DP into VS with the aim that developed product satisfied the market demands identificated in DP extracted from CR.

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