Dragana Makajić Nikolić

• PhD
• Professor (Associate) at University of Belgrade

This study proposed a novel approach for conducting the credit risk assessment of financing a small hydropower plant (SHPP) project in Serbia via the failure mode and effects analysis (FMEA), which was modified by the Dempster–Shafer Theory (DST). A qualitative analysis of financing the SHPP project was performed to identify and describe the risk e...

Investments in mini hydropower plants (MHPP) in Serbia are associated with numerous risks, both in the construction and exploitation phases. To assess these risks, this study proposes a methodology combining fault tree analysis and risk matrix using data obtained through a survey and semi-structured interviews with domain experts. Conducting qualit...

Various architectures can be applied in software design. The aim of this research is to examine a typical implementation of Jakarta EE monolithic and microservice software architectures in the context of software quality attributes. Software quality standards are used to define quality models, as well as quality characteristics and sub-characterist...

In the last 50 years of human development, waterrelated hazards have been dominating among the disasters, that have caused both human casualties and economic damage. Floods are among the top ten worst types of natural disasters, positioning on an unenviable third place, when taking in account, above all, the number of human lives that have been los...

Present-day airline industry is quite a competitive field and crew scheduling represents one of the crucial problems due to significant impact on the airline’s cost. The crew scheduling problem is based on the assignment of crew members to operate different tasks of route. The main goal of this paper is to provide an analysis and a solution to one...

Research Question: Optimal financing of the raw material inventories in the copper processing industry is perceived as a problem of choosing the financing sources and determining the purchase dynamics. Motivation: The company can realize the financing of raw material inventories from multiple sources under various conditions. The company efforts sh...

Rezime: U upravljanju proizvodnjom postoji veliki broj performansi i indikatora performansi koji se mogu meriti i pratiti. Na osnovu definisanih ciljeva proizvodnog preduzeća, moguće je definisati performanse i indikatore performansi za četiri faze upravljanja proizvodnjom (planiranje, organizovanje, realizovanje, kontrola). Za svaku fazu upravljan...

We propose a ski injury risk assessment model which allows ski resorts to take targeted and preventive actions towards critical ski regions. Currently, ski resorts mostly measure ski injury risk based on the ratios constituted of the number of injuries and number of skier days. We argue that this measure can be improved by using ski lift transporta...

The unique and at the same time very complex nature of the wine requires a more thorough selection process compared to other consumer products. Wine consumers are faced with a number of brands, grape varieties, and regions of origin, diverse tastes and prices. Using discrete choice experiment this study explores the importance that consumers in Ser...

Spreadsheets have been widely used in many business and scientific areas for modeling and simulation. Nevertheless, a number of research surveys have shown that these applications are particularly prone to errors. Some of the reasons for this error-proneness can be attributed to the fact that spreadsheet models are usually developed by the end-user...

Background/Aim. Among the other challenges of the 21st century, medical waste (MW) has become an arising problem for both the environment and people because of its increasing amount, variety, and complexity. That is way MW management has become one of the very important ecological imperatives. Serbia with no potential for appropriate disposal of al...

Behavioral finance literature shows that in addition to Markowitz’s rate of return and risk, private investors consider various other stock features. This paper discusses the problem of determining investors’ preferences for portfolio selection criteria, as well as the problem of optimal portfolio determination from the investors’ point of view. Th...

This paper considers a stochastic programming problem with a number of random parameters in the set of constraints. The method used for solving the problem is the iterative optimization-simulation approach. It consists of two phases: optimization phase, which includes solving a deterministic counterpart of the original chance-constrained problem, a...

Identification of critical components is one of the most demanding tasks in designing complex systems and determination of priorities in maintenance planning process. In reliability theory, importance measures are used to estimate the relative criticality of systems' componentsi.e. to rank the components according to the impact of their reliability...

Planiranje rasporeda odeljenja u zdravstvenim ustanovama ili rekonstrukcije postojećih je kompleksan zadatak na strateškom nivou odlučivanja. Konfuzni rasporedi odeljenja mogu doprineti anksioznosti pacijenata, povećati utrošeno vreme i pređeni put pacijenata. Razvijanje kvantitativnih pristupa u rešavanju ovog problema datira od kraja sedamdesetih...

Importance measures are used for indexing system components due to their impact on the system’s overall reliability. In order to identify the specific number of the most critical components, first-ranked components are singled out as the most important ones. However, importance measures consider only the influence of individual components and they...

In the context of growing concern over the global environment and related sustainability issues, the purpose of this research is to stimulate discussion about the Environmental Performance Index (EPI) and its necessary role not only in measuring postgraduate students' attitudes about EPI, and its nine categories underpinned, but also, their importa...

This paper examines the causes of risk preferences, as one of the personality traits, of the participants in the supply chain on inventory and backorder costs. Based on test results the participants are divided into two groups: risk - seeking and risk - averse. Two teams are formed who simulated a beer game. It is shown that there are differences i...

A new approach to determination of the most critical multi-state components in multi-state systems is presented. The approach is based on solving an appropriate reliability optimization problem. The consideration is restricted on coherent and homogenous systems. Multi-state components may have different and distinct states which vary from complete...

Predmet ovog rada predstavlja problem utvrđivanja skupa komponenata najznačajnijih za pouzdanost složenih sistema u slučaju kada su poznati troškovi podizanja pouzdanosti pojedinačnih komponenata, a ukupan raspoloživi budžet za podizanje ukupne pouzdanosti sitema je ograničen. U radu se predlaže nova troškovna mera značajnosti dobijena rešavanjem o...

Each economy specializes in certain economic activities depending on the development level and availability of resources. During their development, countries undergo sectoral transformation. In order to achieve a higher level of economic development, it is necessary for a country to diversify its economic activities and determine which economic act...

Providing an efficient and reliable system of medical waste management is one of the key environmental issues not only for health-care institutions but for a wider range of organizations and communities. Medical waste produced in health care is a special kind of waste, which, if inadequately treated, can cause numerous possible health and safety ha...

U složenim sistemima koji se sastoje od velikog broja međusobno povezanih komponenata postoji problem određivanja onih K komponenata koje imaju najveći uticaj na ukupnu pouzdanost sistema. U klasičnim pristupima, koji se u literaturi najčešće navode kao određivanje mera značajnosti, se na različite načine razmatra uticaj pojedinačnih komponenti na...

U današnjem poslovnom okruženju kompanije su primorane da preuzimaju značajan rizik ukoliko žele da brzo i uspešno plasiraju novi proizvod na tržište. Stoga, sposobnost efikasne identifikacije i upravljanja rizikom se smatraju ključnim tačkama u realizaciji visoko rizičnih projekata inovacija proizvoda. U radu će biti predstavljen novi, hibridni mo...

Purpose – The purpose of this paper is to develop a methodology for automatically determining the optimal allocation of police officers in accordance with the division and organization of labor. Design/methodology/approach – The problem is defined as the problem of the goal programming for which the mathematical model of mixed integer programming...

In a world with growing energy demand and increasing energy scarcity, the need for new methods of risk analysis of energy supplies has been emphasized. These methods became even more important for specific energy resources whose future usage is quite questionable, such as oil. This paper will try to examine potential use of one such method for meas...

The subject of this paper is human error as cause of technical and organizational system failure. The risk analysis, as important part of the modern project and processes management, focus increasing attention to the study of human reliability and human error. Human error is considered as any activity outside the tolerance limits which are predefin...

This paper observe multi-period multi-product production planning problem in make-to-stock production environment with limited production capacity. Such problem is identified in Fast Moving Consumer Goods industry. The goal was to develop an algorithm for supporting dynamic production triggering decisions in relation with two supply chain key perfo...

Rezime:Korišćenje Petrijevih mreža, kao moćnog alata za modeliranje dinamičkih procesa u svrhu analize i optimizacije performansi lanaca snabdevanja nije nov koncept. Ovaj rad je koncipiran kao preglednik skorije objavljenih radova iz oblasti lanaca snabdevanja i Petrijevih mreža. Cilj rada je da pruži informacije o tome u kojoj tački se istraživan...

Rezime:Korišćenje Petrijevih mreža, kao moćnog alata za modeliranje dinamičkih procesa u svrhu analize i optimizacije performansi lanaca snabdevanja nije nov koncept. Ovaj rad je koncipiran kao preglednik skorije objavljenih radova iz oblasti lanaca snabdevanja i Petrijevih mreža. Cilj rada je da pruži informacije o tome u kojoj tački se istraživan...

Differences in the level of economic achievement in different countries are determined by the availability of resources and economic policies. Economic development could be influenced by the structure of economic activities. The paper brings the analysis of Serbian economic activities structure and its influence on the level of development during t...

Having in mind the immense value of the Danube River and knowing that risk assessment of its pollution is one of the key elements for ecology and the health of people in its region, in this paper we emphasized the importance of risk assessment of ship-generated wastewater - particularly in the case of greywater discharges. Although, a number of met...

In recent years, the need for greater accountability and improvement in teaching’s quality has become a major issue in higher education. The results of student evaluation of teaching are increasingly used to make judgments about teaching quality, career advancement, and the funding of teaching itself. An important component of any such student eval...

This paper proposes a new method for minimal cut sets generation of a coherent fault tree (FT) without repeated events. The approach is based on a special type of Petri nets – reverse Petri net (RPN) which can be generated directly from the FT. Using RPN properties and state equation, we have shown that the problem of finding all minimal cut sets b...

In the twentieth century electricity was produced and transmitted by and between monopolistic public electric power companies. Over the last twenty years, electricity markets have been deregulated allowing customers to choose from a number of competing suppliers and producers. On one hand electricity market participants try to first satisfy their o...

This paper provides a methodology for university promotion planning, directed towards a target group of potential students. An important aim is to point out the possibility of modeling the university promotion, as well as optimization of the plan for specific promotional activities. The predominant problem researched was how to create an accurate t...

The problem of determining weights of criteria appears in many contexts in multiple criteria decision making. For solving this task it is necessary to determine individual influence of each considered criterion. Each criterion can be either quantitative - when each of attributes can take different values or qualitative - in which case only ranking...

Upon the completion of the common first-year curriculum, under graduate university students may find it difficult to choose the most appropriate study program. This paper deals with a methodology that may help students select it on the basis of their first-year marks, i.e. their efficiency. We have used data on the students marks from the official...

This paper will focus on a make-to-stock multi-period order fulfilment system with random orders from different classes of customers under limited production circumstances. For this purpose a heuristic algorithm has been developed aimed at maximizing the customer service level in any cycle and in the entire multi-period. In this paper, in order to...

This paper presents the methodology of planning the Multiple Special Event (MSE) - the establishing of the precise time schedule (timetabling) of special events having same goals, content and anticipated effects but taking place at different locations. An original Goal Programming (GP) model of the decision-making procedure related to Multiply Spec...

From the aspect of the development of a country, the energy sector represents a domain of strategic interest. Generation and use of energy resources most often belongs to the public sector, and are most often under the influence of the government in most countries. This paper analyzes the risks that are characteristic to the business of the public...

In this paper, the problem of day-ahead planning in the trading section of energy trading companies has been considered. It has been assumed that the demand and supply are arranged and that the additional MW and transmission capacity can be purchased. The problem is observed as directed multiple-source and multiple-sink network and then represented...

PETAR PAVLOVIĆ Visoka tehnološka škola strukovnih studija, Šabac, petarpavlovic@yahoo.com DRAGANA MAKAJIĆ-NIKOLIĆ Fakultet organizacionih nauka, Beograd, makajic-nikolic.dragana@fon.rs IVANA GRUJIĆ Visoka tehnološka škola strukovnih studija, Šabac, ivanagrujic@yahoo.com Rezime: Predmet rada je simulacija složenog stohastičkog sistema signalisane ra...

An approach to business process reengineering (BPR) is presented and illustrated in the paper. The approach is based on Coloured Petri Nets (CPN) as a general tool for modeling, simulation and analysis of system processes. In realization of a BPR project there are two crucial phases in which the AS-IS model and the TO-BE model are created. This imp...

A bus maintenance system in a transport organization is discussed. The bus fleet consists of different types of buses operating on international, intercity and local lines. The fleet should have good corrective and preventive maintenance. Periodic inspections and preventive maintenance activities must be conducted following the manufacturer's recom...

The paper presents some of the results obtained by studying Petri nets' capability for modeling and analysis of Supply Chain performances. It is well known that the absence of coordination in Supply Chain management causes the so-called Bullwhip Effect, in which fluctuations in orders increase as they move up the chain. A simple three-stage supply...