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Lidija Čuček, 2013, doktorska disertacija

Opis: This doctoral dissertation, which consists of four substantive wholes, presents several syntheses of sustainable bioprocesses using computer-aided process engineering. In the first part the synthesis of different integrated processes of ethanol production from the entire corn plant is presented. The synthesis of different processes is in the second part further extended to the simplified and more comprehensive synthesis of bioproducts in the whole production supply chain network. Synthesis is based on the generic optimisation model of biomass production and supply chain networks. In the third part three methods for sustainable development assessment, suitable for multi-criteria optimisation, are presented: method of sustainability indexes, footprints and combined criteria, such as eco- and total profit. Methods are further upgraded with indirect effects in order to measure the unburdening the environment, associated with the use and replacement of environmentally-harmful products. Methods include the direct, indirect and total impacts on the environment. In the last part the methodology for reducing a large number of criteria within multi-objective optimisation to a small number of representative criteria is presented. This method is presented on the case of environmental footprints.
Ključne besede: Biomass energy generation, Supply chain networks, Synthesis of sustainable bioprocesses, Life Cycle Analysis, Sustainability assessment, Multi-objective optimisation, Dimensionality reduction, Representative Objectives Method
Objavljeno: 06.05.2013; Ogledov: 1406; Prenosov: 184
.pdf Celotno besedilo (4,29 MB)

Mastering supply chain risks
Borut Jereb, Tina Cvahte, Bojan Rosi, 2012, izvirni znanstveni članek

Ključne besede: supply chain, risk management, risk assessment, risk catalog, ISO 31000:2009, ISO 28000:2007
Objavljeno: 10.07.2015; Ogledov: 706; Prenosov: 44
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Systemic thinking and requisite holism in mastering logistics risks
Borut Jereb, Teodora Ivanuša, Bojan Rosi, 2013, izvirni znanstveni članek

Opis: Risks in logistic processes represent one of the major issues in supply chain management nowadays. Every organization strives for success, and uninterrupted operations are the key factors in achieving this goal, which cannot be achieved without efficient risk management. In the scope of supply chain risk research, we identified some key issues in the field, the major issue being the lack of standardization and models, which can make risk management in an organization easier and more efficient. Consequently, we developed a model, which captures and identifies risks in an organization and its supply chain. It is in accordance with the general risk management standard - ISO 31000, and incorporates some relevant recent findings from general and supply chain risk management, especially from the viewpoint of public segmentation. This experimental catalogue (which is also published online) can serve as a checklist and a starting point of supply chain risk management in organizations. Its main idea is cooperation between experts from the area in order to compile an evergrowing list of possible risks and to provide an insight in the model and its value in practice, for which reason input and opinions of anyone who uses our model are greatly appreciated and included in the catalogue.
Ključne besede: supply chain, risk management, systemic thinking, risk catalogue, requisite holism
Objavljeno: 10.07.2015; Ogledov: 516; Prenosov: 38
.pdf Celotno besedilo (1,49 MB)
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On chains in H-closed topological pospaces
Oleg Gutik, Dušan Pagon, Dušan Repovš, 2010, izvirni znanstveni članek

Opis: Preučujemo verige v ▫$H$▫-zaprtem topološkem delno urejenem prostoru. Podamo zadostne pogoje za maksimalno verigo ▫$L$▫ v ▫$H$▫-zaprtem topološkem delno urejenem prstoru (▫$H$▫-zaprti topološki polmreži), pri katerih ▫$L$▫ vsebuje maksimalen (minimalen) element. Podamo tudi zadostne pogoje, pri katerih je linearno urejen topološki delno urejen prostor ▫$H$▫-zaprt. Dokažemo, da je linearno urejena ▫$H$▫-zaprta topološka polmreža ▫$H$▫-zaprt topološki delno urejen prostor in, da to v splošnem ne velja. Konstruiramo primer ▫$H$▫-zaprtega topološkega delno urejenega prostora z nezaprto ▫$H$▫-zaprto maksimalno verigo ter podamo zadostne pogoje, pri katerih je maksimalna veriga ▫$H$▫-zaprtega topološkega delno urejenega prostora ▫$H$▫-zaprt topološki delno urejen prostor.
Ključne besede: matematika, H-zaprt topološki delno urejen prostor, veriga, maksimalna veriga, topološka polmreža, regularno urejeni delno urejeni prostori, MCC-veriga, maksimalna veriga topološkega delno urejenega prostora, razpršen prostor, mathematics, H-closed topological partially ordered space, chain, maximal chain, topological semilattice, regularly ordered pospace, MCC-chain, scattered space
Objavljeno: 10.07.2015; Ogledov: 384; Prenosov: 35
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A Short review of chain controlling systems in livestock production technology
Dejan Škorjanc, Maksimiljan Brus, Igor Vojtic, 2005, pregledni znanstveni članek

Opis: There is a general agreement that the main reason for domestication was to provide a reliable source of food protein. Wild animals were hunted for thousands of years, killed for meat, wool, fur, and liquid by our predecesors.This one-way relationship between humans and animals was changed much later, during domastication and until know, the men took responsibility for animals and changed and developed different production system and ethical relationship with animals. After Second World War, the governments tried to change so called traditional agriculture to more intensive. Animals have been kept in high concentration and for the continuous production as a consequence,disease control became essential. European Union issued the paper on food safety (White paper on food safety 2000) where the EU commission triedto push forward a framework of legislation for further improvement and to develope more transparent and improved quality standards throughout a food chain from farm to table. This paper reviews a number of recent developments, starting with an integrated quality control system that collecting important data from the animal birth, through to the animal rearing phase to the end (i.e. slaughter). The importance of Hazard Analysis Critical Control Point (HACCP) is discussed together with their concepts to assure safe animal food production.
Ključne besede: animals, chain controlling systems, food safety
Objavljeno: 10.07.2015; Ogledov: 404; Prenosov: 10
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Alternative forecasting techniques that reduce the bullwhip effect in a supply chain
Francisco Campuzano Bolarín, Antonio Guillamón Frutos, Ma Del Carmen Ruiz Abellón, Andrej Lisec, 2013, pregledni znanstveni članek

Opis: The research of the Bullwhip effect has given rise to many papers, aimed at both analysing its causes and correcting it by means of various management strategies because it has been considered as one of the critical problems in a supply chain. This study is dealing with one of its principal causes, demand forecasting. Using different simulated demand patterns, alternative forecasting methods are proposed, that can reduce the Bullwhip effect in a supply chain in comparison to the traditional forecasting techniques (moving average, simple exponential smoothing, and ARMA processes). Our main findings show that kernel regression is a good alternative in order to improve important features in the supply chain, such as the Bullwhip, NSAmp, and FillRate.
Ključne besede: bullwhip effect, supply chain, kernel regression, system dynamics model
Objavljeno: 31.05.2017; Ogledov: 283; Prenosov: 33
.pdf Celotno besedilo (938,51 KB)
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Assessing the impact of prices fluctuation on demand distortion within a multi-echelon supply chain
Francisco Campuzano Bolarín, Antonio Guillamón Frutos, Andrej Lisec, 2011, pregledni znanstveni članek

Opis: Price fluctuation is a practice commonly used by companies to stimulate demand and a main cause of the Bullwhip effect. Assuming a staggered step demand pattern that responds elastically to retailer’s price fluctuation, and by using a supply chain management dynamic model, we will analyse the impact of these fluctuations on the variability of the orders placed along a traditional multilevel supply chain. Subsequently, the results obtained will serve to propose a forecasting model enabling to calculate the potential variability of orders placed by each echelon on the basis of the price pattern used. Finally, under the hypothesis of an environment of collaboration between the different members of the chain, we propose a predictive model that makes it possible to quantify the distortion of the orders generated by each level.
Ključne besede: bullwhip effect, systems dynamics, price fluctuation, supply chain management
Objavljeno: 01.06.2017; Ogledov: 275; Prenosov: 87
.pdf Celotno besedilo (560,46 KB)
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Multicriteria optimisation in logistics forwarder activities
Tanja Poletan, Alen Jugović, Ratko Zelenika, 2007, izvirni znanstveni članek

Opis: Logistics forwarder, as organizer and planner of coordination and integration of all the transport and logistics chains elements, uses adequate ways and methods in the process of planning and decision-making. One of these methods analysed in this paper, which could be used in optimisation of transport and logistics processes and activities of logistics forwarder, is the multicriteria optimisation method. Using that method, in this paper is suggested model of multicriteria optimisation of logistics forwarder activities. The suggested model of optimisation is justified in keeping with method principles of multicriteria optimization, which is included in operation research methods and it represents the process of multicriteria optimization of variants. Among many different processes of multicriteria optimization, PROMETHEE (Preference Ranking OrganizationMethod for Enrichment Evaluations) and Promcalc& Gaia V. 3.2., computer program of multicriteria programming, which is based on the mentioned process, were used.
Ključne besede: traffic, transport, forwarding, logistic chain, planning, optimisation, PROMETHEE
Objavljeno: 05.06.2017; Ogledov: 253; Prenosov: 27
.pdf Celotno besedilo (3,86 MB)
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Bullwhip effect in the information flow of a supply chain
Tadeja Lampret, Vojko Potočan, 2014, izvirni znanstveni članek

Opis: The main goal of our research is to analyze and display causes of a bullwhip effect formation within a supply chain, as well as to provide the appropriate solutions to limit the occurrence of the bullwhip effect by using the proper information flow and partners´ cooperation within the supply chain. The bullwhip effect is one of the most important issues in the supply chain management and it is present in many companies. It preserves a character of invisibility because there are lots of causes for its formation and they are usually difficult to discern. The bullwhip effect is a phenomenon of an increase in the order variability within a supply chain. The higher we are within the supply chain, the higher is the order variability. The company encountered with the whip effect can successfully reduce its impact by improving the information flow, as well as improving partners´ cooperation within the supply chain. In this way the company can limit its negative repercussions and increase the profit. The article focuses on the overview of the bullwhip effect within a distribution chain, from its causes to suggestions and measures how to ease its negative repercussions on the organisation. Part of the causes could be found in the market demand variability and in the lack of communication about the actual marked demand within the supply chain. The rest of the causes are related to obstacles that emerge among different partners within the supply chain (role of culture). A qualitative analysis is applied on the basis of the selected cognitions from the supply chain management. The quantitative analysis is based on the theoretical research of the effective flow of information among the participants and its contribution to the reduction of the bullwhip impact. The article discusses two research questions: 1) The correct information flow within the supply chain and the improvement of the communication among partners can lead to the bullwhip effect reduction, and 2) A reduction of the bullwhip influence can lead to the increase of cooperation among partners. The results of the analysis can be used for further research.
Ključne besede: bullwhip effect, information flow, marked demand variability, orders variability, supply chain, logistics, business logistics, management, acquisition policy
Objavljeno: 06.07.2017; Ogledov: 240; Prenosov: 29
.pdf Celotno besedilo (279,62 KB)
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