Jože Rožanec

Mr. Jože Rožanec

Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 November 2022 in International Journal of Production Research
Verified
Journal Article
Open access
Jože RožanecJože Rožanec
Jože Rožanec
INInna Novalija
Inna Novalija
PZPatrik Zajec
Patrik Zajec
Klemen KendaKlemen Kenda
Klemen Kenda
HGHooman Tavakoli Ghinani
Hooman Tavakoli Ghinani
JSJohn Soldatos
John Soldatos
Human-centricity is the core value behind the evolution of manufacturing towards Industry 5.0. Nevertheless, there is a lack of architecture that considers safety, trustworthiness, and human-centricity at its core. Therefore, we propose an architecture that integrates Artificial Intelligence (Active Learning, Forecasting, Explainable Artificial Intelligence), simulated reality, decision-making, and users' feedback, focussing on synergies between humans and machines. Furthermore, we align the proposed architecture with the Big Data Value Association Reference Architecture Model. Finally, we validate it on three use cases from real-world case studies.

16 November 2021 in International Journal of Production Research
Verified
Journal Article
Closed access
Jože RožanecJože Rožanec
Jože Rožanec
Jinzhi LuJinzhi Lu
Jinzhi Lu
JRJan Rupnik
Jan Rupnik
MŠMaja Škrjanc
Maja Škrjanc
DMDunja Mladenić
Dunja Mladenić
Dimitris KiritsisDimitris Kiritsis
Dimitris Kiritsis
Actionable Cognitive Twins are the next generation Digital Twins enhanced with cognitive capabilities through a knowledge graph and artificial intelligence models that provide insights and decision-making options to the users. The knowledge graph describes the domain-specific knowledge regarding entities and interrelationships related to a manufacturing setting. It also contains information on possible decision-making options that can assist decision-makers, such as planners or logisticians. This paper proposes a knowledge graph modelling approach to construct actionable cognitive twins for capturing specific knowledge related to production planning and demand forecasting in a manufacturing plant. The knowledge graph provides semantic descriptions and contextualisation of the production lines and processes, including data identification and simulation or artificial intelligence algorithms and forecasts used to support them. Such semantics provide ground for inferencing, relating different knowledge types: creative, deductive, definitional, and inductive. To develop the knowledge graph models for describing the use case thoroughly, systems thinking approach is proposed to design and verify the ontology, develop a knowledge graph and build an actionable cognitive twin. Finally, we evaluate our approach in two use cases developed for a European original equipment manufacturer related to the automotive industry as part of the European Horizon 2020 project FACTLOG.

12 January 2022 in Information
Verified
Journal Article
Open access
PDF file
PEPavlos Eirinakis
Pavlos Eirinakis
SLStavros Lounis
Stavros Lounis
SPStathis Plitsos
Stathis Plitsos
Georgios ARAMPATZISGeorgios ARAMPATZIS
Georgios ARAMPATZIS
KKKostas Kalaboukas
Kostas Kalaboukas
NSNenad Stojanovic
Nenad Stojanovic
Digital Twins (DTs) are a core enabler of Industry 4.0 in manufacturing. Cognitive Digital Twins (CDTs), as an evolution, utilize services and tools towards enabling human-like cognitive capabilities in DTs. This paper proposes a conceptual framework for implementing CDTs to support resilience in production, i.e., to enable manufacturing systems to identify and handle anomalies and disruptive events in production processes and to support decisions to alleviate their consequences. Through analyzing five real-life production cases in different industries, similarities and differences in their corresponding needs are identified. Moreover, a connection between resilience and cognition is established. Further, a conceptual architecture is proposed that maps the tools materializing cognition within the DT core together with a cognitive process that enables resilience in production by utilizing CDTs.

30 April 2021 in Applied Sciences
Verified
Journal Article
Open access
PDF file
KKKostas Kalaboukas
Kostas Kalaboukas
Jože RožanecJože Rožanec
Jože Rožanec
AKAljaž Košmerlj
Aljaž Košmerlj
Dimitris KiritsisDimitris Kiritsis
Dimitris Kiritsis
Georgios ARAMPATZISGeorgios ARAMPATZIS
Georgios ARAMPATZIS
Supply chain agility and resilience are key factors for the success of manufacturing companies in their attempt to respond to dynamic changes. The circular economy, the need for optimized material flows, ad-hoc responses and personalization are some of the trends that require supply chains to become “cognitive”, i.e., able to predict trends and flexible enough in dynamic environments, ensuring optimized operational performance. Digital twins (DTs) is a promising technology, and a lot of work is done on the factory level. In this paper, the concept of cognitive digital twins (CDTs) and how they can be deployed in connected and agile supply chains is elaborated. The need for CDTs in the supply chain as well as the main CDT enablers and how they can be deployed under an operational model in agile networks is described. More emphasis is given on the modelling, cognition and governance aspects as well as on how a supply chain can be configured as a network of connected CDTs. Finally, a deployment methodology of the developed model into an example of a circular supply chain is proposed.

1 May 2022 in Information Fusion
Verified
Journal Article
Open access
Jože RožanecJože Rožanec
Jože Rožanec
BFBlaž Fortuna
Blaž Fortuna
DMDunja_Mladenic Mladenic
Dunja_Mladenic Mladenic

23 July 2021 in Applied Sciences
Verified
Journal Article
Open access
PDF file
Jože RožanecJože Rožanec
Jože Rožanec
BKBlaž Kažič
Blaž Kažič
MŠMaja Škrjanc
Maja Škrjanc
BFBlaž Fortuna
Blaž Fortuna
DMDunja_Mladenic Mladenic
Dunja_Mladenic Mladenic
Demand forecasting is a crucial component of demand management, directly impacting manufacturing companies’ planning, revenues, and actors through the supply chain. We evaluate 21 baseline, statistical, and machine learning algorithms to forecast smooth and erratic demand on a real-world use case scenario. The products’ data were obtained from a European original equipment manufacturer targeting the global automotive industry market. Our research shows that global machine learning models achieve superior performance than local models. We show that forecast errors from global models can be constrained by pooling product data based on the past demand magnitude. We also propose a set of metrics and criteria for a comprehensive understanding of demand forecasting models’ performance.