Martin Krajčovič

University of Žilina · Department of Industrial Engineering

The increase in computer computing power and the development of simulation software make it possible to realise very accurate predictions of the impact of decisions on systems. The cost of investments in streamlining logistics and manufacturing systems is usually high. Therefore, verifying whether the implemented improvement will have a real intend...

The article deal with the problem of choosing an effective software tool for developing virtual trainings. The Ella platform as an innovative solution for creating of virtual training is presented. In the introductory part of the article, the Ella platform is presented as the result of our development. Ella is an integrated software ecosystem as a...

Due to the rapid increase and development of new information technologies, it is now possible to collect real data from the production process, thereby creating an image of a real plant in a virtual environment. The concept of a digital twin in the design of production systems consists of creating a digital twin of the entire production plant, whic...

The article’s main goal is to describe the system design for the analysis of disinfection automated guided vehicle (AGV) utilisation so that the AGV’s optimal number can be determined. The simulation was used as the system’s main tool, allowing a relatively objective approach to imitate real system behaviour. With the proposed system, it is possibl...

Maximizing knowledge transfer is one of the main factors of modern education. It is important to raise the probability that students can successfully apply acquired knowledge into practice. This article deals with virtual reality (VR) as an alternative method to provide students with a more immersive approach to semester assignments and their compl...

Today's market is oversaturated with new technologies that are slowly moving through our daily routine. Businesses often have to pursue new strategies to reach new customers and retain existing ones. Popular technologies of today undoubtedly include virtual reality (VR) and augmented reality (AR). The application of augmented reality in the field o...

The requirement to achieve effective solutions in the shortest possible time in the manufacturing environment is essential, and it can be solved only by effective production planning methods. The scientific problem is that traditional methods for creating and assessing the production plans are insufficient for the future and it is necessary to look...

The article deals with the design of an innovative system for scheduling piece and small series discrete production using a combination of parametric simulation models and selected optimization methods. An innovative system for solving production scheduling problems is created based on data from a real production system at the workshop level. The m...

Nowadays, digitalization is becoming a common practice. Companies are striving to replicate every necessary process in digital form. This allows them to simulate every designed optimization before its real-life implementation, significantly reducing potential cost. To do so, it is necessary to convert every involved object into its digital form (mo...

The current development of logistics says that only the fastest, cheapest, and most efficient in terms of productivity wins. The role of the designer of the logistics system is already in the design phase to incorporate flexibility into its properties as well as the ability to react quickly to constantly changing conditions. With the advent of digi...

The article deals with the design of virtual reality (VR) interactive training as a teaching method and its effect on knowledge transfer and retention of students. The first part presents the methodology of the VR interactive training design. The second part utilizes the created interactive training for a case study to evaluate its effect on the te...

In the last decade, simulation software as a tool for managing and controlling business processes has received a lot of attention. Many of the new software features allow businesses to achieve better quality results using optimisation, such as genetic algorithms. This article describes the use of modelling and simulation in shipment and sorting pro...

(1) At present, it is important to bring the latest technologies from industrial practice into the teaching process of educational institutions, including universities. The presented case study addresses the application of educational games in virtual reality to the teaching process in a university environment. (2) The study took place at the Depar...

Designing a workplace may be a challenging task. It is important to make sure that the new workplace will prevent unnecessary resource waste, but also create a safe working environment for employees. Therefore, creating a virtual copy of the workplace before its real-life implementation may help to eliminate design shortcomings. This article presen...

The main object of the article is a design system for faster data actualisation in Tecnomatix Plant Simulation software through the AttributeExplorer function and Microsoft Excel. Many companies that use simulation as the optimisation tool is meet the problem of the models up to date and actualisation time demands. The designed system that uses the...

The design and operation of intelligent production and logistics systems requires the strong support of digital technologies today. A production and logistics system is normally modelled in a virtual environment, allowing rapid work with an extensive data set and "what - if" analyses to help optimize the resulting system design for performance, pro...

Current trends in manufacturing, which are based on customisation and gradually customised production, are becoming the main initiator for the development of new manufacturing approaches. New manufacturing approaches are counted as the application of new behavioural management patterns that calculate the retained competencies of decision-making by...

The plants are primarily focused on increasing the efficiency of internal processes. The management of production plants therefore needs to know a realistic picture of their current state, risks and opportunities, so that the plant's presence on the market is not jeopardized and they are able to effectively manage internal and external processes. A...

This paper focuses on the sustainability of material flow and intralogistics in factories, two of the primary keys to productivity. In the past ten years, there has been significant interest in the sustainability of intralogistics to increase productivity. The aim of this article is to investigate the consequences of combining two factories into on...

The use of modern information and communication technologies plays a key role in the current global competitive environment of long-term manufacturing company sustainability. Based on the requirements of Slovak industrial companies (both domestic and foreign companies), there is a need to implement these technologies into the university teaching pr...

The main object of the article is a design system for faster data actualization in Tecnomatix Plant Simulation software through the AttributeExplorer function and Microsoft Excel. Many companies that use simulation as the optimization tool is meet the problem of the models up to date and actualization time demands. The designed system that uses the...

Sustainable manufacturing is not just about manufacturing, but also products and services. In the area of custom production processes, there may also be circumstances of organizational management where compliance with labor productivity and the due-date principle is problematic. Similar products with different operating times cause the throughput o...

The current development in production is directed towards a system called socio-cyber-physical, where humans, machine facilities, materials, technologies and the environment work together. Processes in companies are enrolling in a platform called Industry 4.0. Production is more similar to a living organism where the planned dynamic in the field of...

This paper presents a possibility of applying modelling and simulation in logistic processes management and design in production enterprises. New functionalities of the modelling software, especially those connected with analysing material and information flow, are already necessary for designing and evaluating complex logistic systems. The possibi...

Continuous cost reduction is a subject of interest for almost every production company. The cost reflects the competitiveness and sustainability of the business. Many company costs are linked to the effectiveness of production. One such cost is the work-in-progress (WIP) inventory cost. The present article deals with the design of a system for calc...

This article introduces an innovative view on the issue of Stereoscopy’s application as a tool of advanced industrial engineering. Basic starting points of research have been the results of stereoscopy applications in other science areas and entertainment industries, e.g., movies. These bases provide information about basic principles of stereoscop...

The long-term sustainability of the enterprise requires constant attention to the continuous improvement of business processes and systems so that the enterprise is still competitive in a dynamic and turbulent market environment. Improvement of processes must lead to the ability of the enterprise to increase production performance, the quality of p...

This article describes the topic of warehouse designing with using computer simulation tools. In the introduction of article is described digital factory itself and future of digitalization. The core of article includes description of methodology of warehouse designing with using tools of the digital factory. Any disturbance effects, non-delivery o...

Implementation of the digitization and growth of the manufacturing processes intelligence are increasingly becoming necessity in today´s factories. Digitization and globalization are opening new market opportunities, in particular for small factories. The realization of the Digital Factory is the strategic goal of many factories for the next years....

In this article, authors described selected logistics automation tools (ASLP) and briefly presentedthe PROMETHEE multi-criteria decision making method in terms of its application in assessing the implementation of ASLP in the field of production logistics. A methodology for preparing the data required toevaluate the ASLP implementation process base...

The main topic of the submitted paper is intelligent logistics and its integration into production systems. In the beginning, the problem that lies in the inadequate knowledge of the internal state has been defined. The new society-wide trends that will originate in a few years are also outlined. Those trends will affect factories and their logisti...

This paper deals with a new research of designing proactive maintenance processes for the Fourth Industrial Revolution, the so-called Industry 4.0. The mission and position of maintenance in a modern managed factory is highlighted by the fact that maintenance is one of the major processes that affect production productivity. In the near future, wha...

Decentralized coordination and route planning face the challenges such as scalability, dynamic changes (disturbances) in the environment, continuous planning, and coordination issues (i.e., deadlock and livelock situations). Self-organized delegate multi-agent systems (D-MASs) have proven to be effective decentralized coordination mechanisms for co...

This article deals with optimizing of transport distances in orders picking processes. Article shows solution how to optimize orders picking in warehouse using dynamic simulation. In article basic steps of order picking planning process are described in order to minimize distances traveled by truck or human. The basis of this solution is execution...

This paper presents research done at the University of Žilina, in cooperation with CEIT (Central European Institute of Technology). The topic of focus in this article is the Smart Connected Logistic System, which utilizes all the most advanced principles such as Mobile Robotic Systems (MRS), Mobile Automated Platforms, Multi-Agent Cloud based contr...

The article presents practical knowledge about production process optimisation as a result of implementing a specialized system monitoring the work of machining tools. It features complex results of the conducted research with use of dedicated equipment and software, whose unconventional application may appear to be an effective IT tool for taking...

The article describes how to improve business processes by using modeling and simulation tools. A dynamic business environment requires continuous improvement of business processes. By using process improvement tools, the enterprise gains insight into ongoing processes, which is the basic requirement for a planned change. The simulation tools provi...

The need for flexibility of layout planning puts higher requirements for utilisation of layout and location problem solving methods. Classical methods, like linear programming, dynamic programming or conventional heuristics are being replaced by advanced evolutionary algorithms, which give better solutions to large-scale problems. One of these meth...

Current requirements which are connected with designing new, or reali-zing the existing production systems, cause continuous and rapid changes in products and processes. This means that classical approaches of pro-duction systems design have to be extended by advanced technologies and methods, such as digital factory, virtual and augmented reality,...

This article deals with basic information about individual form of logistics trend called integrated logistics. The core of the article contain description of integrated logistics, the development of integrated logistics management in company and the benefits that brings to company. The article presents the usability of new knowledge in the next di...

In this article the basic information for cost reduction in warehouse facilities by use of new technologies is presented. The core of article constitutes of the description of new technologies and their impact on design warehouses. The article discusses the influence of new technology on the way the data is collected, on the storage of goods, their...

In the course of logistics systems designing, great emphasis has been recently put on speed, quality and flexibility of the proposed solutions. The logistics system draft requires then not only an analysis of the logistics systems requirements, a draft of several solution variants and their static verification but also dynamic verification of perfo...

Augmented Reality (AR) technology is becoming more available for everyday applications, providing advanced information about the observed objects. In this paper we present a system combining optical tracking and augmented reality with applications in local large areas. We use two different tracking technologies for positioning objects: the infrared...

Globalisation of entrepreneurship has not only opened world markets but also global competition. The fundamental criteria for decisions on allocation of manufacturing capacities are currently not only costs (manufacturing, logistics, etc.), but mainly quality (of products, processes and services), flexibility (types of products, capacity, space, ti...

Current requirements for continuous reduction of products, processes and systems life cycles increase the need of rapid design of “lean” and “flexible” production systems. This means that classical approaches of production systems design have to be extended by the application of advanced technologies and methods, such as digital factory, virtual an...

This article examines the problem of application of augmented reality in terms of picking goods in static systems with the deployment of a man (systems "goods to man"). Article describes a comprehensive methodology for the use of augmented reality in the process of picking starting from the preparation of input data, through optimizing the movement...

Globalization has confirmed that the competitive ability of organizations is conditioned by the successful development of innovations. Innovation management and development of innovative potential of organizations are becoming a scientific problem, since the existing approaches in this area do not have satisfactory results. The paper presents a new...

This paper describes an algorithm of dynamic inventory control system for large numbers of material items with continuous non-stationary demand. It uses principles of pull inventory control systems, statistical inventory analysis and joint replenishment inventory systems. This algorithm was processed in software module (VBA for Excel) and applied i...

This article examines the problem of application of augmented reality in terms of picking goods in static systems with the deployment of a man (systems .,goods to man"). Article describes a comprehensive methodology for the use of augmented reality in the process of picking starting from the preparation of input data, through optimizing the movemen...

This paper deals with selected areas of concept of Zilina Intelligent Manufacturing System (ZIMS), which is developed by the Faculty of Mechanical Engineering in collaboration with CEIT and other faculties of the University of Zilina. Main research areas realized in the framework of ZIMS cover the basic processes in the entire product lifecycle fro...

This paper describes a methodology for inventory analysis and reduction, which was developed at the Department of Industrial Engineering, Faculty of Mechanical Engineering, University of Zilina. The methodology describes the optimal procedure for the application of basic analytical methods and tools in practice. The results of the analysis are in t...

The study assessed the relation between the overall degree of perceived foreign accent in non-natives' English speech and a variety of factors. Five native speakers of English were asked to auditorily evaluate the samples of free English speech produced by each of 99 non-native, , talkers using the equal-appearing interval scale. The 5-point scale...