This thesis presents a comparative analysis of tandem and custom-built triaxial forestry trailers using the Quality Function Deployment (QFD) method. The aim of the research was to determine the extent to which the technical solutions of each trailer configuration meet key user requirements, such as payload capacity, stability, efficiency, and digital integration. Using the QFD matrix, user expectations were quantitatively mapped to technical attributes, enabling a comprehensive assessment of design responsiveness. The analysis demonstrated that tandem trailers are better suited for operations on rugged terrain due to their agility and lower mass, while triaxial trailers provide superior stability, increased load capacity (up to 33.500 kg), and advanced digital diagnostics. Additional findings highlight the value of applying QFD early in the design process and the sensitivity of results to weighting factors. The discussion confirms the applicability of the method even with a limited sample if data is well structured. Further enhancements are recommended through finite element simulations (FEM) and life-cycle cost (LCC) analysis.
|
