Faculty of Mechanical Engineering

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Author: search.filters.author.Trajce VelkovskiHas files: No

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    Innovativeness of micro and small enterprises – Are their innovation drivers different?
    (Faculty of Technical Sciences, University of Novi Sad, 2020-10)
    Bojan Jovanovski
    ;
    Radmil Polenakovik
    ;
    Ivana Stankovska
    ;
    Trajce Velkovski
    ;
    Bojan Jovanoski
    In the second half of the 20th century the labor cost, along with the level of in-dustrialization was considered to be the fundamental competitiveness factors. In today’s competitive business environment, innovation is the vital ability and ac-tivity for firm’s sustainability. Although the innovation is widely examined in the literature, further research is needed in this field to address which factors deter-mine the innovativeness of micro and small enterprises. The purpose of this re-search was to fill in that gap through development and implementation of a meth-odology for modelling of the innovativeness of micro and small enterprises. The first step is the analysis of the relevant literature and mapping two types of factors that are widely discussed: influencing factors – supporting innovation and influ-enced factors. The conceptual model that was developed based on these findings is refined through structured interviews of 18 experts from different stakeholders in the innovation ecosystem. The refined model is validated through 150 quantita-tive interviews with micro and small companies in the Northeast region of North Macedonia. Based on the validated model, the following factors are most influen-tial in the analyzed region: the openness of the company, the identification of the employees with the company, communication, owner’s profile, diversification in educational areas of employees and encouraging employees to propose innova-tion. The methodology and the models offer significant input into future research, as well in the development of analytical tools at the regional level, as well as for modelling of innovativeness on company level.
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    Integration of value stream mapping & discrete event simulation: A case study from Lean
    (Faculty of Technical Sciences, University of Novi Sad, Serbia, 2020-10)
    Bojan Jovanoski
    ;
    Robert Minovski
    ;
    Marjan Todorov
    ;
    Trajce Velkovski
    ;
    Bojan Jovanovski
    The purpose of this paper is to present the practical implementation of value stream mapping (VSM) by monitoring selected key lean parameters and using a discrete event simulation (DES) to generate scenarios for improvement of the process. The value stream mapping, as one of the basic lean tools, forms the basis for pre-senting the current state of the system and at the same time opens guidance and opportunities for improvement. The experimentation, i.e. the transition from "as is" to "to be" state of the system is driven by the discrete event simulation, which eliminates the disadvantages of the classic "pencil driven method" and replaces them with the possibilities of the simulation as a tool where it is easy to quantify the change in the system and show the benefit of implementing lean methods. The progress and transit to the future state of the system is monitored through selected key performance indicators. Various experiments have been conducted showing the methodological approach to process improvement.
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    Assessment of green energy efficiency of rural tourism facilities
    (Faculty of Technical Sciences, Novi Sad, 2024-09)
    Dragana Stanojević
    ;
    Ivana lončarević
    ;
    Vladimir Mučenski
    ;
    Mirjana Terzić
    ;
    Trajce Velkovski
    The energy efficiency of buildings is a crucial factor in reducing global energy consumption and CO2 emissions, thereby contributing to the fight against global warming. This paper analyzes 14 rural tourism properties, examining the impact of various input parameters and building characteristics on output parameters such as annual heating demand, specific delivered energy, and annual CO2 emissions. The results demonstrate a significant impact of building size, heating volume, and the number of heating degree days on energy efficiency, highlighting the importance of carefully selecting materials and energy sources for sustainable construction.