1. Implementation of the scheduling domain description modelAlenka Baggia, Robert Leskovar, Miroljub Kljajić, 2008, izvirni znanstveni članek Opis: This paper presents the problem of auniform scheduling domain description. It was established that the algorithm used for scheduling is general, disregarding the type of scheduling domain. On the basis of five different scheduling domains, a general description model was developed. The research is focused on the programming application of the resource scheduling model, presented as a UML class diagram. Diverse meta-languages for the model description were considered. Of these XML, an EAV model and object oriented languages have shown to be the most effective. Even though Java is not widely used as a description language, it has proved effective as a meta-language for the description of the extensible scheduling model.
Ključne besede: scheduling, domain description, description language, object oriented analysis
Objavljeno v DKUM: 30.11.2017; Ogledov: 1117; Prenosov: 406
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2. EditorialMiroljub Kljajić, Gerhard-Wilhelm Weber, 2014, predgovor, uvodnik, spremna beseda Ključne besede: education, research, systems, modeling, group decision making
Objavljeno v DKUM: 29.11.2017; Ogledov: 1128; Prenosov: 108
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3. EditorialMiroljub Kljajić, Gerhard-Wilhelm Weber, 2012, predgovor, uvodnik, spremna beseda Ključne besede: education, research, systems, modeling, group decision making
Objavljeno v DKUM: 29.11.2017; Ogledov: 1191; Prenosov: 100
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4. The development of sugar beet production and processing simulation model : a system dynamics approach to support decision-making processesČrtomir Rozman, Andrej Škraba, Karmen Pažek, Miroljub Kljajić, 2014, izvirni znanstveni članek Opis: Background: The sugar beet is the main field crop used for sugar production in the temperate climatic zone. The abolishment of the quota system will open new investment opportunities in countries that were forced to abandon sugar industry as the result of the reform in 2006. Present paper describes the modeling of sugar beet production and its processing into sugar for purpose of decision support.
Methods: A system dynamics methodology was chosen to model impacts of regional sugar factory investment. We present two basic concepts of system dynamics models at causal loop diagram level. The first holistic model deals with regional planning of new product development and the second one deals with factory model.
Results: The holistic model presented main feedback loops and dynamics of main elements in the case of regional investment into sugar industry. The factory model considered the specifics of the beet processing which is a) limited period of beet processing and b) initial adjustment to the production capacity at the start of the production season
Conclusions: The model seeks answers to strategic questions related to the whole sugar beet production and processing system and will be used for simulation of different scenarios for sugar production and their impact on economic and environmental parameters at an aggregate level.
Ključne besede: sugar beet, system dynamics, simulation, model
Objavljeno v DKUM: 04.04.2017; Ogledov: 1608; Prenosov: 132
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5. Sugar beet production : a system dynamics model and economic analysisČrtomir Rozman, Miroljub Kljajić, Karmen Pažek, 2015, izvirni znanstveni članek Opis: Background and Purpose: The sugar beet is the main field crop used for sugar production in the temperate climatic zone. Since investment in sugar beet industry are long term and ireversible the decision support and economic analysis are required in order to maximise investment returns.
Methodology: A system dynamics methodology was chosen to model the impacts of regional sugar factory investments. We present the basic concepts of system dynamics (SD) models and their development in the case of sugar beet production and processing systems. Sugar beet economics are also analyzed using the static technological economic simulation model.
Results: The simulation provides answers to strategic questions related to the total sugar beet production and processing system and will be used for the simulation of different scenarios for sugar production and their impact on economic and environmental parameters at an aggregate level. Furthermore, the feasibility analysis of sugar beet production revealed that at the current price and intensity levels (yields), we can expect profitable sugar beet production for both white sugar and ethanol.
Conclusion: Preliminary results show that under expected production parameters the sugar beet processing and production would be economically feasible.
Ključne besede: sugar beet, modeling, system dynamics, economic feasibility
Objavljeno v DKUM: 04.04.2017; Ogledov: 1721; Prenosov: 237
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6. Informacijski sistem za podporo odločanju za mala podjetja z ekološko prehranoJasna Peternel, 2016, magistrsko delo/naloga Opis: Magistrsko delo se osredotoča na razvoj informacijskih sistemov za podporo odločanju za mala podjetja, ki se ukvarjajo z ekološko prehrano. Odločanje predstavlja ključno komponento uspešnosti podjetja, ki mora biti ustrezno podprto z informacijsko tehnologijo. Merjenje uspešnosti informacijskih sistemov (IS) postaja vse bolj pomembno. V magistrskem delu smo za merjenje uspešnosti sistema za podporo odločanju prilagodili posodobljen D&M model uspešnosti IS. Model uspešnosti IS za mala podjetja je vseboval tri neodvisne spremenljivke (kvaliteto informacijskega sistema, kvaliteto informacij, kvaliteto storitev) in odvisno spremenljivko (zadovoljstvo uporabnikov). Konceptualni model smo z uporabo sistemske dinamike preoblikovali v vzročno-zančni diagram s pozitivnimi in negativnimi zankami. Za pridobivanje podatkov smo razvili anketni vprašalnik v obliki spletne ankete, ki temelji na prilagojenem modelu uspešnosti sistemov za podporo odločanju. Vprašalnik je bil distribuiran izbranim malim podjetjem, ki se ukvarjajo z ekološko prehrano. Kvantitativno pridobljene podatke smo nadalje statistično obdelali ter preverili raziskovalne hipoteze. Ugotovili smo, da kvaliteta informacij in kvaliteta storitev vplivata na zadovoljstvo uporabnikov, medtem ko kvaliteta IS nima vpliva.
Ključne besede: malo podjetje, sistem za podporo odločanju, uspešnost IS, sistemska dinamika
Objavljeno v DKUM: 05.07.2016; Ogledov: 1591; Prenosov: 136
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