Applied Mechanics and Materials Vol. 693

Abstract: The term business intelligence (BI) represents the tools and systems that play a key role in the strategic planning process of the corporation. These systems allow a company to gather, store, access and analyze corporate data to aid in decision-making. Necessary fundamental definitions are offered and explained to better understand the basic principles and the role of this technology for a company management. The proposed article is logically divided into more sections, where the stages of basic research in the field of data mining are described gradually. This involves the definition of the technology and the list of main advantages and analytical methods incorporated in online analytical processing. Also some typical applications of above mentioned particular methods are introduced. The focus of this paper is to introduce the options of using the data mining methods on the control systems level within the hierarchical control systems model.

Abstract: Synograph is a graphic equivalent of a synonym. It denotes various symbols/graphs with the same or very similar meaning. Till now synographs have appeared rarely and in diverse branches. They are, e. g. software engineering, linguistics, medicine, also marketing theory – with a slightly modificated word form, synography. Synograph can serve as a new inspiration in a research as well as in an education. The modest aim of this contribution is to introduce synographical approach as a next possible tool for dynamical systems analysis.

Abstract: The main aim of the paper lies in providing a proposal of technical system optimization in terms of maximizing its reliability when a certain sum of maintenance costs is given, or minimizing maintenance costs to achieve the defined reliability. The technical system is analyzed using the method called fault tree analysis (FTA) and the final diagram is represented by a tree structure. At the top of the diagram, there is an undesired event which represents the system failure. This top event is analyzed and branched into several other events in order to obtain all possible faults of system elements and their combinations which lead to the system failure. Each primary event contains basic information as minimal and maximal reliability and the corresponding maintenance costs. As a result, it is possible to calculate the total probability of system failure, respectively to its reliability, and the total costs needed to ensure the required system reliability. Genetic algorithms are used and applied in the diagram created by FTA. The paper contains the whole proposal of using a genetic algorithm in order to optimize costs and system reliability on the basis of defined conditions. The described proposal is implemented within a functional application and then tested using real data. The results form an integral part of this paper.

Abstract: The aim of the project was to optimize the company's inventory management and to suggest measures to minimize inventory and costs and maximize production in an effective and sustainable way. The effectiveness and sustainability of the logistics processes was focused on streamlining of inventory management through the actualization and improvement of existing system Kanban. In the context of sustainable development we propose the Kanban method because its principles are to eliminate waste and to ensure employees satisfied. In the centre of attention is the employee and the company should care for its satisfaction by means of enhancement of workplaces. The objective of this paper is to present characteristics of the Kanban method in theory and practice; it addresses actualization and improvement of the Kanban system and recommendations for future sustainable Kanban system. The work is a part of KEGA project No. 037STU-4/2012 - Implementation of the subject “Sustainable Corporate Social Entrepreneurship” into the study program Industrial management in the second degree at the MTF STU Trnava. and submitted project VEGA No. č.1/0510/15 Sustainable strategic management vs. sustainable corporate social responsibility vs. integrated management system of strategic business units.

Abstract: Six Sigma is one of methodologies of the quality management for the process improvement. It can be used in manufacturing companies, in order to achieve certain criteria established by management or customer requests. Six Sigma is based on the assumption that opportunities for success are hidden in every process and it gives the company a common tool for defining of corporate objectives. Implementation of this methodology lies in the integrated approach in solving the problems of business processes, which can represent significant benefits in production processes as well as various non-production processes. Six Sigma is based on the principle of measuring, monitoring and controlling processes with possible application of statistical methods, different tools and techniques. If the Six Sigma methodology is used properly and rationally, companies can save considerably with this effort the measurable financial resources. Its application leads to a cost reduction in inefficient processes, contributes to the production quality, better performance and to the satisfaction of internal and/or external customers.The objective of the paper is to present base theoretical aspects of Six Sigma framework and its principles. Followed with methodology of Six sigma and in addition is addressed a concrete application for statistical process control of the lacquering process within silencers manufacturing for a company in the automotive industry. The practical contribution of the project provides an improvement of the process, which means to improve the product quality, achieve cost reduction and better customer satisfaction.

Abstract: Automation in the software testing process has significant impact on the overall software development in industry. Therefore, any automation in software testing has huge influence on overall development costs. The present article reviews the current state of the art of test case design automation via genetic algorithms. Three approaches applied in software testing are described with regards to their applicability in the testing of embedded software.

Abstract: This article discusses the possibilities of linking simulation and optimization methods, processes and tools to solve complex tasks of optimal design and process control in production and logistics systems. A theoretical model of simulation-based optimization is formulated. Its use in resolving practical problems as well as methods for the integration of algorithms for multi-criteria optimization into the simulation model are outlined.

Abstract: The paper describes an analysis of suitability of a tire model and its model properties with respect to values of the car body acceleration, or running stability of the vehicle. In the frame of the solution simulations were run on a modified example model of a vehicle from the library of ADAMS/Car. The monitored dynamic parameters were a function of the used tires and chosen driving maneuvers. Evaluation of the simulations was done independently for inflated tires and for underinflated tires. The overview of the evaluated results of the simulations is presented in a table, while the weight parameter reflects the accuracy of calculated values.

Abstract: The paper presents fundamental principles and application of the large-scale truss structure PKP25-20i optimal design based on a multi-criteria optimization algorithm. The multi-objective function contains conditions for deformation, stability and cumulative damage obtained by finite element analyses. The whole process was implemented and realized in special Matlab’s procedures and FEM software Cosmos/M.

Abstract: This paper presents results of a carried out research in the field of scanning precision of contactless optical 3D scanners. Results stated in this paper bring great benefits to practice, since it demonstrates the quality and limits of measuring by means of contactless optical systems in real conditions and therefore its possible use in the field of inspecting the dimensional and shape precision of industrial products.A measurement etalon of various shapes and sizes was designed and manufactured for the purpose of this analysis. The nominal dimensions of the etalon were set by measuring of the coordinate measuring machine and these real values were compared to the model obtained by optical digitisation of Atos II and RevScan. Based on the evaluation of results, scanner measurement precision diagrams were drawn according to the studied aspects, e.g. dependence on the shape of the measured element and its nominal size. Another essential part of the research was determining the ability of 3D scanners to capture detailed parts of the model and assessing the scanning limits for each of the optical systems.