Прегледај по Аутор "Gojković, Ranka"
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- СтавкаABC Classification of Risk Factors in Production Supply Chains with Uncertain Data(Hindawi, 2017) Vujović, Aleksandar; Đorđrvić, Aleksandar; Gojković, Ranka; Borota, MilanThe problem of classification of risk factors in an uncertain environment is part of the risk management problem, which has a critical effect on the competitive advantage of production supply chain. The severities of consequences, their relative importance, and the frequency of occurrence of risk factors are defined by risk management team, depending on their experience and the results of good practice. Fuzzy rating of the severities of consequences and the frequency of occurrence of risk factors are described by linguistic expressions, which are modeled by triangular fuzzy numbers. The risk values, obtained by the materialization of the identified risk factors, are given precisely with the usage of fuzzy algebra rules. The classification criterion is defined as the distance between current risk value and extreme risk values. The proposed model enables determination of the priorities of risk factors. It is illustrated by an example with real-life data from a production supply chain in auto industry.
- СтавкаAbility of managers for crisis management in small enterprises: study in Bosnia and Herzegovina(2017) Medaković, Vlado; Moljević, Slaviša; Gojković, Ranka; Vasković, SrđanSince the enterprise have been existing, crisis of enterprise is well-known. Researches in area of possible appearance crisis in small and medium size enterprises, and sciense enterprise management which is crisis, have large significance when we talk about survival those enterprises, apropos possible prevention their bancrot. We can see that theory is mostly dedicated to enterprises repairing. The early symptom in sight of crisis and prevention latent crisis of enterprise are pointed up. Crisis management and analysis of strategy for turn out from the crisis, as we can see in this is paper, expand views and enable giving certain recomendations for appliance in practice.
- СтавкаCOMPARATIVE ANALYSIS COMPETENCIES IN TRADITIONAL AND AGILE PROJECT MANAGEMENT APPROACHES(Mašinski fakultet Istočno Sarajevo, Univerzitet u Istočnom Sarajevu, 2022) Savković, Marija; Komatina, Nikola; Nestić, Snežana; Gojković, Ranka; Golubović, Dušan; Milutinović, Miroslav; Prodanović, SašaIn order for the project to be successfully implemented, each individual involved in the project must possess appropriate competencies and skills. Competencies/skills have a great influence when assembling the project team itself and when deciding on the inclusion of new members in the existing project team. In particular, the competencies and skills of the project manager have an impact on the successful realization of the project's goals. The members of the project team must possess certain competencies/skills in order to successfully cooperate with each other and to successfully implement the tasks assigned to them. The main goal of this research paper is a comparative review and analysis of competencies/skills in traditional and agile project management approaches. Also, the paper highlights the roles, responsibilities and powers of each team member, both in the traditional and in the agile approach.
- СтавкаEDUCATING STUDENTS FROM WBC TO IMPROVE ENTREPRENEURIAL COMPETENCIES(Faculty of Engineering, University of Kragujevac, Center for Quality, 2018) Gojković, Ranka; Nestić, Snežana; Moljević, Slaviša; Đorđević, Aleksandar; Aleksić, Aleksandar; Arsovski, Slavko; Stefanović, Miladin; Tadić, DanijelaThe development of entrepreneurial capacities is one of the key objectives of EU policy. There is an increasing awareness that entrepreneurial skills, knowledge and attitudes can be learned. This leads to the ever more noticeable development of an entrepreneurial mindset and entrepreneurial culture in individuals and society as a whole. Partly because of the current crisis and high unemployment, the labor market is increasingly in demand for multidisciplinary engineers with additional skills. Engineering education is therefore faced with new challenges that require a higher level of entrepreneurial competencies. This paper presents the influence of education in the field of entrepreneurship on improvement of entrepreneurial competences among students of engineering disciplines.
- СтавкаELIMINATION LEAN WASTE IN THE PRODUCTION PROCESS(Technical faculty "Mihajlo Pupin", University of Novi Sad, 2021) Gojković, Ranka; Moljević, Slaviša; Marić, Bogdan; Medaković, VladoTo survive in the market, it is necessary to develop a new approach to improve the production process. Waste elimination represents great potential in terms of improving the production process. To eliminate wastes, it is necessary to perform an analysis of the work process, to identify all the causes that lead to wastes and, based on that, to plan and implement improvement measures to reduce or eliminate these wastes. In this paper, it is proposed to eliminate Lean wastes by eliminating the failures that lead to them. Identifying and eliminating failures also leads to eliminating wastes. The Ishikawa diagram was used to identify failures. By applying the failures elimination method, Lean waste will also be eliminated.
- СтавкаEnhancing of ZA-27 alloy wear characteristics by addition of small amount of SiC nanoparticles and its optimisation applying Taguchi method(Balkan Scientific Centre, Belgrade, Serbia, 2022) Vencl, Aleksandar; Stojanović, Blaža; Gojković, Ranka; Klančnik, Simon; Czifra, Árpád; Jakimovska, Kristina; HARNIČÁROVÁ, MartaThe objective of this work was to investigate the influence of the addition of a small amount of SiC nanoparticles on the mechanical characteristics and wear resistance of ZA-27 alloy. The ZA-27 alloy-based nanocomposites were produced by a relatively cheap compocasting process preceded by mechanical alloying. Reinforcing elements were the silicon carbide (SiC) nanoparticles with an average size lower than 50 nm and in very small amounts of 0.2, 0.3 and 0.5 wt. %. Wear tests were realized on a block-on-disc tribometer under lubricated sliding conditions, at two sliding speeds (0.25 and 1 m/s), two normal loads (40 and 100 N) and a sliding distance of 1000 m. Optimisation of the SiC amount was performed by applying the Taguchi method, showing that the SiC amount of 0.5 wt. % is optimal for the given testing conditions. Prediction of the results and wear maps were also conducted. The analysis of variance showed that the SiC amount has the greatest influence on wear rate (70.8 %), followed by the normal load (19.8 %), and the sliding speed (3.9 %), while the influences of all interactions between these factors did not have any significant influence.
- СтавкаEvaluation and Selection of the Quality Methods for Manufacturing Process Reliability Improvement—Intuitionistic Fuzzy Sets and Genetic Algorithm Approach(MDPI, 2021) Gojković, Ranka; Ðurić, Goran; Tadić, Danijela; Nestić, Snežana; Aleksić, AleksandarThe aim of this research is to propose a hybrid decision-making model for evaluation and selection of quality methods whose application leads to improved reliability of manufacturing in the process industry. Evaluation of failures and determination of their priorities are based on failure mode and effect analysis (FMEA), which is a widely used framework in practice combining with triangular intuitionistic fuzzy numbers (TIFNs). The all-existing uncertainties in the relative importance of the risk factors (RFs), their values, applicability of the quality methods, as well as implementation costs are described by pre-defined linguistic terms which are modeled by the TIFNs. The selection of quality methods is stated as the rubber knapsack problem which is decomposed into subproblems with a certain number of solution elements. The solution of this problem is found by using genetic algorithm (GA). The model is verified through the case study with the real-life data originating from a significant number of organizations from one region. It is shown that the proposed model is highly suitable as a decision-making tool for improving the manufacturing process reliability in small and medium enterprises (SMEs) of process industry.
- СтавкаEXPERIMENTAL ANALYSIS OF HEAT DISSIPATION FROM THE ELECTRIC MOTOR(University Politehnica Timisoara, Faculty of Engineering Hunedoara, 2022) Moljević, Slaviša; Đokić, Njegoslav; Gojković, Ranka; Imre, KissIn order for an automobile company to survive on the market, it is necessary that their products comply with the specifications and requirements of customers. For the realization of specifications, it is necessary to constantly control the production process, as well as certain parameters that depend exclusively on customer requirements. In this paper, an electric motor named Colt is observed and analyzed. Three groups of motors and their heat dissipation to the environment were observed. Due to the construction and the position where the electric motor is installed in the vehicle, the impact of heat dissipation on the environment is extremely important, which is defined by the customer. In addition to enabling adequate data to be obtained, this analysis will allow for the accelerated approval of PPAP samples.
- СтавкаEXPERIMENTAL MEASUREMENT OF SLIDING BEARING TEMPERATURE USING THERMOGRAPHY(Faculty of Engineering Hunedoara, University Politehnica Timisoara, 2019) Moljević, Slaviša; Đurić, Aleksija; Gojković, Ranka; Marković, BiljanaIn this paper is shown an example of the use of thermography in the measurement of temperature of the sliding bearings. The temperature is very important by sliding bearings, so it is necessary to measure frequently and the contactless gauges allow it in a very simple way. This paper shows that the measurement is bit dependent on the manufacturer of the camera that measures the temperature, it is important that the camera is intended for such measurements and that the basic parameters such as emissivity and measurement distance are well adjusted. Different camera manufacturers enrich accessories, which certainly helps users to handle the camera more easily, but from the aspect of temperature accuracy, cameras of the same characteristics give approximately similar results.
- СтавкаIMPACT OF INNOVATION ON THE GROWTH AND DEVELOPMENT OF SMEs IN BOSNIA & HERZEGOVINA(Faculty of Engineering, University of Kragujevac, 2019) Tihić, Dino; Moljević, Slaviša; Gojković, RankaSmall and medium enterprises are by their very nature almost compelled to seek their place on the market through the implementation of innovative processes and innovations. Innovation is one of the processes that contribute to sustaining the competitiveness of the company, showing the operational flexibility and the ability to acquire new knowledge, that is, a favorable exchange of information with its environment in which it operates. This paper presents an overview of the innovation impact in SMEs in Bosnia and Herzegovina, observing the impact factors in which innovation influences growth and development, and thus the overall success of the company.
- СтавкаIMPLEMENTACIJA SISTEMA UPRAVLJANJA ENERGIJOM ISO 50001:2011 U BIH(Mašinski fakultet Istočno Sarajevo, Univerzitet u Istočnom Sarajevu, 2016) Gojković, Ranka; Moljević, Slaviša; Gordić, Dušan; Marković, Biljana; Antunović, RankoPotreba za pravilnim korištenjem energetskih resursa i obnovljivih izvora energije dovela je do uspostavljanja novog međunarodnog standarda u cilju sprečavanja nepravilne potrošnje energije i smanjenja zagađivača životne sredine. Svrha ovog standarda je da omogući organizacijama da uspostave sistem i procese potrebne za poboljšanje energetskih performansi, uključujući i energetsku efikasnost, korištenje i potrošnju. Implementacija sistema za upravljanje energijom, pomaže organizacijama u planiranju radi smanjenja troškova energenata, optimizaciji primjene energije, smanjenja zagađivanja životne sredine i obezbjeđenje odgovarajućeg sadržaja energije proporcionalnog kvaliteta i troškova.
- СтавкаLAYER THICKNESS INFLUENCE OF MACRO- AND MICROSTRUCTURE QUALITY OF 3D PRINTED PARTS(Faculty of Engineering, University of Kragujevac, 2019) Đurić, Aleksija; Gojković, Ranka; Marković, Biljana; Moljević, Slaviša; Anić, JelicaIn this paper will be analyzed the influence of the layer thickness on the micro and macro structure of the parts obtained by 3D printing, i.e. fused filament fabrication (FFF) technology. Specimens for analysis will be printed on the 3D printer Zotrax M 200, and the macro and microstructure will be done on the VHX 6000 microscope. It will be shown in the paper that by increasing the thickness of the layer, the time required for the production of the part will be significantly reduced, but also the quality of the surface is also significantly affected.
- СтавкаLEAN WASTE IN THE MANUFACTURING INDUSTRY(Mašinski fakultet Istočno Sarajevo, Univerzitet u Istočnom Sarajevu, 2020) Gojković, Ranka; Nestić, Snežana; Radić, Nebojša; Prodanović, SašaIn principle, the basic idea of achieving Lean production is continuous waste reduction. This implies a reduction of all activities that do not contribute to the successful operation of the company, and thus do not add value to the product or service. Each wastes significantly affects the production time, price as well as the quality of the product, which makes the company less competitive in today's market. By identifying failures that lead to Lean waste and reducing or eliminating them, the wastes are reduced, which leads to a significant improvement in the production process. Continuous improvement in production through waste elimination has been recognized as one of the most important tasks of socially responsible organizations.
- СтавкаORGANIZACIJA I UPRAVLJANJE KVALITETOM U MALIM I SREDNJIM PREDUZEĆIMA(Fakultet inženjerskih nauka, Kragujevac, Centar za kvalitet, 2015) Medaković, Vlado; Moljević, Slaviša; Vasković, Srđan; Gojković, Ranka; Arsovski, Slavko; Lazić, Miodrag; Miladin StefanovićU ovom radu predstavljeni su elementi organizacije i upravljanja kvalitetom u malim i srednjim preduzećima. Opisan je pojam kvaliteta, kao i evolucija kvaliteta. Definisana su mala i srednja preduzeća. Razmotreni su razlozi za implementaciju sistema kvaliteta u malim i srednjim preduzećima sa aspekta njihove konkurentnosti na tržištu.
- СтавкаPOSSIBILITIES OF IMPLEMENTATION OF THE BALANCED SCORECARD METHOD IN HIGHER EDUCATION(Faculty of Engineering, Center for Quality, 2015) Marković, Nenad; Petković, Darko; Moljević, Slaviša; Marić, Bogdan; Gojković, RankaThis paper describes the application of the BSC to the existing strategy of the university. With its application an unbalanced strategic state is translated to the balanced state on the way of equal engagement of all resources and segments of functioning of HEI. After the estimated needs for the establishment of a BSC, existing strategic goals of HEI are translated into KSF, and later in the KPI, on which basis is the proven original use of the BSC, and that is translating strategy into an understandable set of indicators. On that way the number of original KPI is reduced on the acceptable number for monitoring and decision making. Creating a strategy map is a simplified picture of the strategy and provided a contribution to the effective implementation of the strategy through the understanding of key parameters of all relevant perspectives of functioning.
- СтавкаPRACTICES IN ENTREPRENEURSHIP EDUCATION IN SOUTH EAST EUROPE AND RUSSIA(Center for Quality, University of Montenegro, Center for Quality, University of Kragujevac, Serbia, 2018) Vučijak, Branko; Pašić, Mugdim; Jovanović, Jelena; Idrizi, Altin; Xhevdet, Thaqi; Kurbanov, Eldar; Bajrić, Hadis; Kadrić, Edin; Gojković, RankaThe REBUS project emerged in countries where the younger generations are reluctant to engage in private business and entrepreneurship, preferring “safe” employment at the public (state owned) enterprises. Their awareness of own entrepreneurship potentials is very low, while the capacity of talented and skilled students often stays unutilized once being employed. Thus the REBUS project supports embedding entrepreneurship to the South East Europe and Russian universities, at the same time creating network for cooperation between EU and partner countries. One of the first activities was identification, analysis and description of common practices in entrepreneurship education. For this purpose, a comprehensive desk research was combined with expert interviews to inquire about approaches of learning and teaching, connections to lessons, courses and extracurricular activities and approaches to validate entrepreneurial competences. The stocktaking related to the knowledge and differentiation on entrepreneurial competences, leading questions of the surveys related to gaps between formalised (HE) and informal (personal oriented, e.g. in internships) learning and assessment, potentials for enhancements of acquisition of those competences, validation of entrepreneurial competences and selection of key sub-competences. This paper presents results of research and needs analysis (stocktaking) and project objectives and first results
- СтавкаPRIMJENA SAP ERP SISTEMA U ODRŽAVANJU RiTE GACKO(Mašinski fakultet, Univerzitet u Zenici, 2016) Gojković, Ranka; Gojković, Vladimir; Brdarević, Safet; Jašarević, SabahudinOvaj rad prikazuje proces održavanja u Rudniku i Termoelektrani Gacko koja je nakon primjene SAP softvera u finansijskom menadžmentu, primijenila ovaj softver i u proces održavanja. Prikazana je organizaciona struktura i poslovni procesi u održavanju u zavisnosti od tipa održavanja npr., remont, tekuće održavanje i sl. Na kraju rada su prikazana zaključna razmatranja o prednostima i nedostacima primjene ovog softvera.
- СтавкаPROCESS OF IMPROVING THE ENTREPRENEURIAL COMPETENCIES(Mašinski fakultet, Univerzitet u Istočnom Sarajevu, 2018) Moljević, Slaviša; Gojković, Ranka; Nestić, Snežana; Orašanin, Goran; Tihić, Dino; Golubović, Dušan; Košarac, Aleksandar; Jeremić, DejanEntrepreneurship, through the creation of new jobs, increased innovation and poverty reduction, has been recognized as the main factor in economic and social development. In this paper, special attention is paid to the development of entrepreneurial knowledge, skills and attitudes through entrepreneurial education. There is an increasing awareness that entrepreneurial skills, knowledge and attitudes can be learned, leading to a more visible development of the entrepreneurial mindset and entrepreneurial culture in individuals and society as a whole. The paper presents the process of improvement of entrepreneurial competences among students of engineering disciplines. The process of improvement represents the approaches developed within Erasmus + REBUS projects.
- СтавкаPROJECT METHODOLOGIES AND THEIR IMPACT ON THE PROJECT SUCCESS(Mašinski fakultet Istočno Sarajevo, Univerzitet u Istočnom Sarajevu, 2022) Jokanović, Mirjana Đajić; El Hajjaji, Soukaina; Gojković, Ranka; Golubović, Dušan; Milutinović, Miroslav; Prodanović, SašaIt is very difficult or even impossible to know precisely at the initial planning stage what are all the activities that need to be carried out in order to complete the project and what their cost and duration parameters are. Also, this could be less or more complex, depending on the project methodology. Traditional approach consists of five phases, which include the planning phase or activity, which means that with this approach planning is imperative. On the other hand, through agile methodology, projects are typically completed in cycles with the next cycle returning to the planning phase. Nowdays it isn’t unknown that many organizations are using a combination of both agile and traditional methods (hybrib model) which may introduce more overhead in regards to additional project documentation. The purpose of this paper is to qualitatively express, based on a literature review, the influence of different project methodologies on the project success, with an emphasis on the application of the project methodologies in different branches of the economy. The results of this work should show which project methodology is best to use in which economic area, in order to more easily ensure the success of the project.
- СтавкаQMS U ODRŽAVANJU INFRASTRUKTURE ORGANIZACIJE- PRIMJER IZ PRAKSE(Društvo održavalaca Bosne i Hercegovine, Mašinski fakultet, Univerzitet u Zenici, 2014-06) Gojković, Ranka; Moljević, Slaviša; Rajković, Dragan; Brdarević, Safet; Jašarević, SabahudinU radu je dat pristup u definisanju održavanja infrastrukture organizacije sa aspekta QMS- primenjen u praksi, kao i neki rezultati do kojih se došlo pri istraživanju pojedinih procesa u praksi.