Publikační činnost Katedry managementu kvality / Publications of Department of Quality Control (639)

Permanent URI for this collectionhttp://hdl.handle.net/10084/70741

Kolekce obsahuje bibliografické záznamy publikační činnosti (článků) akademických pracovníků Katedry managementu kvality (639) v časopisech registrovaných ve Web of Science od roku 2003 po současnost.
Do kolekce jsou zařazeny:
a) publikace, u nichž je v originálních dokumentech jako působiště autora (adresa) uvedena Vysoká škola báňská-Technická univerzita Ostrava (VŠB-TUO),
b) publikace, u nichž v originálních dokumentech není v adrese VŠB-TUO uvedena, ale autoři prokazatelně v době jejich zpracování a uveřejnění působili na VŠB-TUO.

Bibliografické záznamy byly původně vytvořeny v kolekci Publikační činnost akademických pracovníků VŠB-TUO, která sleduje publikování akademických pracovníků od roku 1990.

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Now showing 1 - 20 out of 38 results

Factors affecting Quality 4.0 implementation in Czech, Slovak and Polish organizations: Preliminary research
(Chair of Production Engineering (CPE); University of Maribor, Faculty of Mechanical Engineering, 2023) Wawak, S.; Sütőová, A.; Vykydal, David; Halfarová, Petra
With the proliferation of the Industry 4.0 paradigm, the inadequacy of conventional quality management tools has become increasingly apparent. The preliminary investigation presented in this paper focuses on the identification of the Quality 4.0 readiness level of organizations operating in the Czech Republic, Poland, and Slovakia, as well as affecting factors. The study is based on the review of relevant literature. The web-based questionnaire enabling organizations' representatives through Computer-Assisted Web Interviewing (CAWI) to take part in the study was used. Data from 298 completed responses were subjected to comprehensive analysis. Descriptive statistics and hypothesis testing were applied to analyse the data. Small and medium-sized organizations achieve low levels of Quality 4.0 readiness. Large organizations are better prepared. The study confirmed the dependence between the Quality 4.0 readiness level and whether the organization operates in automotive, while automotive organizations achieved a higher level of Quality 4.0 readiness than other organizations. The significant relationship between the Quality 4.0 readiness level and whether the organization has a certified management system was also confirmed. Received data also enabled the identification of the main barriers and benefits of Quality 4.0 implementation perceived by the organizations. The research findings identify the challenges that enterprises face regarding the Quality 4.0 implementation and the necessary support that organizations require. These findings can be a foundation for developing novel research initiatives and implementation programs. The research results contribute to the existing body of knowledge and bring new information and insights into the field of quality digitalization.
A simulation-based testing of difference in the means of gamma-distributed positive quantities
(MDPI, 2023) Tošenovský, Filip
This paper presents a simulation-based testing procedure that can be easily applied by practitioners who try to determine whether two gamma-distributed variables have the same expected values. From both theoretical and practical points of view, the gamma distribution and the testing in question have been of interest for some time given the many applications they can be used for, which include problems in the fields of economics, industrial statistics, life sciences, and others. The efforts to achieve the stated statistical objective have been focused throughout the years either on performing nontrivial, approximating mathematical steps or on simulations based on resampling techniques of various kinds. This text works with simulations that try to get closer to the true distributions of the quantities of interest so that a test can be designed rather than using samples generated out of samples, as the resampling techniques perform this by taking the initial samples for an approximation of the populations. The results presented in this text were validated, and they were also compared to other methods where possible. The resulting technique was looked upon as a complement to all the techniques that have been presented on this subject. The major advantage of the proposed procedure is seen in its simplicity. Since simulations are the basis for the presented conclusions, the results are unsurprisingly not as general as what could be achieved by exact mathematical deduction, but they do cover a reasonable range of situations that can serve as a basis on which to analogously build further research if desired.
Mutual combination of selected principles and technologies of Industry 4.0 and quality management methods - case study
(Taylor & Francis, 2023) Klaput, Pavel; Hercík, Radim; Macháček, Zdeněk; Noskievičová, Darja; Dostál, Vladimír; Vykydal, David
In this paper the case study of the application of Failure Mode and Effects Analysis (FMEA) on the testbed “Smart Factory Line” has been described. The main goals of this study have been to verify feasibility and applicability of FMEA on such complex technical system and to show real possibilities of integration of Industry 4.0 principles and technologies with selected methods of quality management. The significant part of the paper is formed by extensive literature review of the related topics such as mass customization and individualization, Industry 4.0, Quality 4.0, fault management and their selected principles, methods and technologies, putting the stress on the team cooperation of experts of different specializations. The attention also has been put on the describing testbeds as platforms for the academy world and practice connection. This case of the practical integration of the smart factory testbed design and its products with the new FMEA approach based on the harmonized AIAG and VDA manual has brought new views on the practical realization of smart factories, on importance of building Quality 4.0 and on requirements for interdisciplinary education of the technicians and quality specialists for Industry 4.0.
Graphical tools for increasing the effectiveness of gage repeatability and reproducibility analysis
(MDPI, 2023) Plura, Jiří; Vykydal, David; Tošenovský, Filip; Klaput, Pavel
The article deals with the quality of measured data, which is necessary for effective quality management and successful implementation of the concept Industry 4.0 and the related concept Quality 4.0. The quality of the measured data is determined by the properties of the used measurement system, which are evaluated by measurement system analysis (MSA). Attention is paid to increasing the effectiveness of the repeatability and reproducibility analysis often used in practice. The importance of graphical tools of analysis, which are often neglected in practice, is emphasized in this regard, and new or modified graphical tools are proposed. The proposed graphical tools allow more detailed analysis of the data collected for the study and reveal the causes of the measurement system variability. The information obtained by applying these graphical tools is a valuable basis for proposals of appropriate actions to improve the measurement system. The use of the proposed graphical tools is presented in a real study of the repeatability and reproducibility of the measurement system.
Closed-loop quality management systems: Are Czech companies ready?
(Technická univerzita Košice, 2022) Vykydal, David; Nenadál, Jaroslav
Purpose: The paper brings set of original information related to the next quality management systems development with regard to digitalisation and other features of new era. It proposes basic structure of closed-loop quality management systems (CLQMS) as a mixture of internal, external, horizontal and vertical loops. Methodology/Approach: Comparative literature analysis, standards' analysis, brainstorming, field research, interviews and design review were used. Findings: Information flows are counted as vital part of all advanced closed-loop quality management systems. Authors established definition of CLQMS. 209 of various requirements related to information exchange were discovered through study of ISO 9001:2015, IATF 16949:2016 and EFQM Model, version 2020. These requirements should create a basic platform for CLQMS establishing and development. Authors performed an empirical field research which. Confirmed that current readiness of Czech production companies for CLQMS implementation is insufficient, despite the automotive sector reaches a higher level of such readiness. Research Limitation/Implication: The field research was performed in time span accompanied by stern measures caused by COVID-19. The only English language literature resources were considered for a literature review. Originality/Value of paper: The paper brings original set of information, regarding to definition of the CLQMS, findings from special field research.
Quality 4.0 maturity assessment in light of the current situation in the Czech Republic
(MDPI, 2022) Nenadál, Jaroslav; Vykydal, David; Halfarová, Petra; Tylečková, Eva
Production companies throughout the world are currently facing challenges with the extensive transformation of their processes with regard to digitalisation and other features of Industry 4.0. Simultaneously, traditional quality management processes must be significantly changed, and the umbrella term "Quality 4.0" is used to represent this transformation. Many companies, including Czech enterprises, are still struggling with the concept of Quality 4.0, as there are a lot of uncertainties, misunderstandings, and false approaches. Additionally, a lot of questions arise about how to provide an objective and comprehensive assessment of the company's maturity or readiness for Quality 4.0. Therefore, the main objective of this article is to present our proposal of a framework and methodology on how to assess and measure the maturity level for the implementation of Quality 4.0. This proposal will be supplemented by a presentation of the main results obtained from a special field study, which was conducted at Czech production companies with the aim of obtaining a representative set of information showing their readiness to adopt Quality 4.0 and convert existing quality management systems into the new era. The authors also identify some research gaps, including the necessity to confirm the mutual relationship between the dimensions and items of Quality 4.0 and the sustainable development of companies or society.
Analysis and application of selected control charts suitable for smart manufacturing processes
(MDPI, 2022) Smajdorová, Tereza; Noskievičová, Darja
Nonparametric control charts (NPCC) have shown great potential for monitoring processes in conditions of smart manufacturing with complex structures, various monitored characteristics and the need to process big data. Practical applications of NPCCs are very rare. The main reasons for this situation are a deficiency in software support and a lack of simple but complete instructions for their application. The introduction of such manual, which is based on the authors' own simulations of performance of wide spectrum of NPCCs in conditions of different violations of data prerequisites, leading to recommendations for the selection of the most effective NPCC in various practical situations, is the main goal of this paper. Compared to other similar studies, this approach covers a wider range of control charts, and it was applied to a wider spectrum of data assumption violations. As an integral part of these analyses, an examination of various control chart performance indicators such as ARL, MRL, x(5) and x(95) was performed using simulations to select the best of them. The designed methodology was verified using real data.
Using principles and selected tools of lean six sigma to improve sustainability: A case study
(Taylor & Francis, 2021) Noskievičová, Darja; Moravec, Lukáš
This article is focused on maintaining company's sustainability through application of principles and selected tools of Lean Six Sigma with the aim to improve the efficiency of the beer bottling line. Massive data collection and processing enabled to find core causes of micro-stoppages and reach for increasing the line efficiency which together with cost savings supported factory's sustainability. The article's benefits lie in application of LSS principles and methods to the micro-stoppages reduction and in the design of a modified sigma performance level based on DPMO where one opportunity is equal to one minute of a potential machine undesirable downtime.
Effects of systematic changes in commodity arrangement on the satisfaction of supermarket customers
(Technická univerzita Košice, 2021) Tošenovský, Josef; Tošenovský, Filip; Dočkalová, Ivana
Purpose: The paper investigates if relocation of goods at supermarkets, practised to boost sales, bothers customers and improves financial results of the stores. To explore this, a questionnaire-based poll was run, using questions, such as "Do you mind if commodity is not permanently in the same place?", or "While searching, do you buy anything you did not indend to buy?". Various relations are also observed. For instance, are opinions on product relocation related in any way to age of customers? The study suggests most customers are not satisfied with changes in product location, yet the practices lead to higher sales. It turns out the business principle - only satisfied customers spend more - may not be so true. In the study, some new questions also arose and were evaluated, such as the question "Which management activities have a positive effect on customers?". Methodology/Approach: The paper relies on statistical testing, specifically on the chi-square test of independence and a test of differences in the relative frequency of occurrence of diverse phenomena. Real, empirical data are utilized. Findings: The analysis showed that most customers dislike looking for goods, and many of them buy items that they did not intend to purchase. Thus, a paradox occurs when entrepreneurs dissatisfy customers, yet they register higher profits. Research Limitation/Implication: The results concern a specific scientific field - microeconomic behavioural patterns at supermarkets. Originality/Value of paper: The research presented in this paper is focused on the Czech Republic where it has not been undertaken to date. Work of this kind is not cited in the scientific literature, however.
Identifikace odlehlých hodnot v chemických měřeních s uvážením nesymetrie jejich rozdělení pravděpodobnosti
(Česká společnost chemická, 2021) Tošenovský, Josef; Tošenovský, Filip
Complex customer loyalty measurement at closed-loop quality management in B2B Area - Czech example
(MDPI, 2021) Nenadál, Jaroslav; Vykydal, David; Tylečková, Eva
The main objective of this article is to present our proposal of complex customer loyalty measurement within external feedback loops as a response of Industry 4.0 concept in the area of advanced quality management for business-to-business (B2B) relationships, as customer loyalty and organisational sustainability are two critical factors for long-term success. To reach the goal, deep literature analysis, special field research, interviews with specialists, and development of a new model of closed-loop quality management systems, which are created for Quality 4.0 environment, were used. A new term, complex customer loyalty, is introduced, and twelve basic steps of its measurement are briefly explained, including a set of loyalty indicators, all regarding specific characteristics of B2B context. Special research confirmed that only about 15% of Czech organisations use some systematic approach to customer loyalty measurement within B2B area. In the majority of Czech B2B organisations, closed-loop quality management systems are mostly in early phases of their development. However, there is no doubt that complex customer loyalty measurement will be an important part of these systems. The proposals presented in this article are mostly universal and should be applied not only to Czech companies.
Consistency of pairwise comparisons and its role in optimal detection of customers' preferences
(Technická univerzita Košice, 2020) Tošenovský, Filip
Purpose: This paper analyses a problem that originates in the weighted-average model, a mathematical construct introduced by the theory of multicriteria decision-making that can be used to detect what product a customer desires. The problem occurs because the model needs to know the weight the customer assigns to each product feature, aside from the levels of all the product characteristics, in order to calculate the overall value of the product. And since by one approach the weights can be estimated by optimization, the question arises which optimization criterion to select for the procedure, as different criteria will lead to different weights and thus to different product evaluations. The paper analyses the problem in connection with the so-called consistency of pairwise comparisons, which are utilized in the optimization and describe how much the customer prefers one product feature to another. The analysis shows that the problem of which criterion to use to calculate the weights can be eliminated if the pairwise comparisons are consistent. The analysis is performed within predefined criteria and is supplemented with case studies supporting the findings. Methodology/Approach: Linear algebra, optimization techniques, case studies. Findings: The results represent a prescription customers can use if they want to avoid the pitfalls of selecting a specific optimization criterion when informing the product maker about what they want based on the weighted-average model. Research Limitation/Implication: The results are related to a specific decision-making model, although that model is still very general and natural. Originality/Value of paper: The problem of selecting an optimization criterion to determine decision weights is not discussed in the theory.
Is the value added tax system sustainable? The case of the Czech and Slovak Republics
(MDPI, 2020) Krzikallová, Kateřina; Tošenovský, Filip
The value added tax is an important part of revenues of the European Union and its Member States. The aim of the paper is to statistically analyse the extent of positive impact of selected legislative measures introduced in the fight against tax evasion and discuss subsequently the sustainability of the current value added tax system in the European context. The analysis was conducted for the Czech and Slovak Republics, two traditionally strong trading partners, and for an important commodity, copper. In the analysis, regression methods applied to official time series data on copper export from the Czech Republic to Slovakia were employed together with appropriate statistical tests to detect potential significance of the new legislative tools, the value added tax control statement and reverse charge mechanism. Moreover, the study considers fundamental economic factors that affect foreign trade in parallel. Based on the analysis, there is sound evidence that the major historical turnaround experienced by the time series took place due to the then forthcoming legislative measures that were to restrain the possibility of carousel frauds. The results confirm the positive impact of the measures and also suggest the necessity of more systematic changes in the tax system.
A study of quality assessment in higher education within the context of sustainable development: A case study from Czech Republic
(MDPI, 2020) Vykydal, David; Folta, Martin; Nenadál, Jaroslav
Quality has become an increasingly important and critical success factor at higher education institutions, particularly universities. Numerous discussions have been held about education quality in the context of sustainable development. However, the quality of that education strongly depends on the overall quality of the management system which operates at schools. The principal aim of this article is to present the approaches to the quality management systems' development and their assessment at universities, and share some lessons learned from this area of research. Some possibilities of the ISO 9001 standard's implementation, as well as the application of excellence models as a response to community demands, will be discussed, especially in the context of the recently-introduced Act No. 111/1998 Coll on Higher Education Institutions, which requires quality assurance and quality evaluation. A case study from The VSB-Technical University of Ostrava shows approaches, results and effects of the quality management system implementation.
The new EFQM model: What is really new and could be considered as a suitable tool with respect to Quality 4.0 concept?
(Technická univerzita Košice, 2020) Nenadál, Jaroslav
Purpose: The paper offers a set of original information based on critical analysis of description two last versions of excellence models presented by the European Organisation for Quality Management (EFQM). The principle goal is to present the main advantages and weaknesses of the latest version of The EFQM Model, especially from a practical point of view with respect to a Quality 4.0 era. Methodology/Approach: Comparative analysis of two relevant documents (EFQM, 2012; EFQM, 2019a) was used as a key method. Discussions with 18 quality professionals from Czech production organisations served as a complementary approach. Findings: The basic structure of a new model was completely changed. But the description of certain recommendations by way of guidance points are superficial and confusing. It lays stress on the necessity to transform organisations for the future as well as on comprehensive feedback from key stakeholders. Research Limitation/implication: The latest version of The EFQM Model was published in November 2019, and general knowledge related to this version is naturally limited. Published studies or publicly available experience completely absent. That is why a more in-depth literature review focused on the latest version of The EFQM Model could not be included in this text. Originality/Value of paper: The paper brings an original set of information that was not published yet before. The value of this set should be examined not only from theoretical but primarily from a practical viewpoint.
Thermal expansion behaviors of few-layered graphene-reinforced Al matrix composites
(Elsevier, 2019) Zhou, Weiwei; Chen, Chao; Mikulová, Pavlína; Dong, Mingqi; Fan, Yuchi; Kikuchi, Keiko; Nomura, Naoyuki; Kawasaki, Akira
The thermal expansion behaviors of few-layered graphene (FLG)/Al composites fabricated via spark plasma sintering and hot extrusion were evaluated. We demonstrated the first example of efficiently reducing the coefficients of thermal expansion (CTEs) of Al composites by incorporating FLG. The CTE of the Al matrix decreased from 26.72 x 10(-6) K-1 to 25.53 x 10(-6) K-1 with incorporating of merely 0.4 vol% of FLG. Due to the detachment of FLG-Al interface at elevated temperatures, the CTEs of the composites were slightly higher than those estimated by theoretical prediction. This result was further confirmed by the presence of hysteresis phenomenon of the cyclic expansion behavior of the FLG/Al composite. Moreover, the FLG exhibited a high constraining efficiency of similar to 13, being more effective at lowering the CTEs of Al composites as compared to other traditional fillers. This work could be significant for guiding the design of high-performance graphene/Al composites for thermal management applications.
Interfacial reaction induced efficient load transfer in few-layer graphene reinforced Al matrix composites for high-performance conductor
(Elsevier, 2019) Zhou, Weiwei; Mikulová, Pavlína; Fan, Yuchi; Kikuchi, Keiko; Nomura, Naoyuki; Kawasaki, Akira
Fabricating high-strength Al matrix composites without sacrificing their electrical conductivity is a critical issue in the design of Al-based conductors. Here, we demonstrate for the first time, an example of improving the interfacial load transfer and strength of few-layer graphene (FLG)/Al composites by an appropriate interfacial reaction. Monocrystalline Al4C3 nanorods that tightly conjoined the FLG platelets with the Al matrix were produced by manipulating the sintering temperature. As revealed by transmission electron microscopy and by a shear lag model that provides a quantitative estimate of the strengthening, the Al4C3 nanorods ensured an efficient load transfer at the FLG-Al interface, thereby giving rise to a considerable enhancement of strength in the composite. Moreover, the electrical conductivity is almost as high as that of pure Al, which could be a significant step toward the preparation of high-performance Al-based conductors.
Possibilities of using graphical and numerical tools in the exposition of process capability assessment techniques
(Technická univerzita Košice, 2019) Tošenovský, Josef; Tošenovský, Filip
Purpose: The paper focuses on how the problem of process capability assessment can be handled when taught, using convenient numerical and graphical means. The contents of the paper results from the authors' own academic and practical experience, which suggested that many important steps are overlooked in the process of selecting and using capability indices. Methodology/Approach: Selected problems in capability assessment are illustrated with suitable examples and graphs. Findings: The authors' experience is reflected in the paper, aiming to emphasize what matters and how, and what does not. Also, a new capability index is introduced. Research Limitation/implication: The style in which the problems are analysed may serve as a guide for further studies in the field and capability index applications. Originality/Value of paper: The paper also contains, aside from specific examples, some more advanced techniques, and is therefore accompanied by software readouts, since computer support is required in such cases. Category: Conceptual paper
Comparative statistical analysis of selected control charts for highly capable processes
(Technická univerzita v Liberci, 2019) Jarošová, Eva; Noskievičová, Darja
When a high-quality process is to be controlled by 100% inspection and yes-no decision is employed, several types of charts come into account, e.g. CCC, CCC-r or geometric CUSUM (CCC-CUSUM). The aim of the paper is to examine performance of these charts so that a suitable one can be chosen for a given process. The charts are compared according to the quickness with which the upward shift in the fraction of nonconforming items is detected. The average number of observations to signal (ANOS) instead of the usual average run length (ARL) is determined. While ANOS for CCC or CCC-r charts can be easily calculated based on a geometric or a negative binomial distribution, its computation is quite difficult in the case of CCC-CUSUM chart. The corrected diffusion (CD) approximation was used to determine ANOS and the results were verified by Monte Carlo simulation. Zero-state and steady-state (both fixed-shift and random-shift model) analyses were performed to take different scenarios of the process shift occurrence into account. CCC-3 or CCC-2 and CCC-CUSUM charts were compared. The order r for CCC-r chart was chosen as an optimal value for the given process based on the semi-economic model suggested in Brodecka (2013). Our study revealed that for in-control c o equal to 0.0002 the CCC-CUSUM chart performs best especially for shifts around the pre-specified out-of-control fraction nonconforming. The CCC-r chart may be comparable or even better in detecting larger shifts. The results of the comparative study were utilized for the choice of the most suitable and best performing control chart to control the high-yield process producing ERG (Exhaust Gas Recirculation) sensors. Comparisons of CCC-r and CCC-CUSUM charts can be found elsewhere in literature, but conclusions seem to be rather inconsistent. To our best knowledge no study dealing with such small in-control fraction nonconforming together with the low risk of false alarm has been published yet. The choice of CUSUM's parameters and consequent values of ANOS can help practitioners who need to control high-quality processes.
APSS - Software support for decision making in statistical process control
(Technická univerzita Košice, 2018) Noskievičová, Darja
Purpose: SPC can be defined as the problem solving process incorporating many separate decisions including selection of the control chart based on the verification of the data presumptions. There is no professional statistical software which enables to make such decisions in a complex way. Methodology/Approach: There are many excellent professional statistical programs but without complex methodology for selection of the best control chart. Proposed program in Excel APSS (Analysis of the Process Statistical Stability) solves this problem and also offers additional learning functions. Findings: The created SW enables to link altogether separate functions of selected professional statistical programs (data presumption verification, control charts construction and interpretation) and supports active learning in this field. Research Limitation/implication: The proposed SW can be applied to control charts covered by SW Statgraphics Centurion and Minitab. But there is no problem to modify it for other professional statistical SW. Originality/Value of paper: The paper prezents the original SW created in the frame of the research activities at the Department of Quality Management of FMT, VSB-TUO, Czech Republic. SW enables to link altogether separate functions of the professional statistical SW needed for the complex realization of statitical process control and it is very strong tool for the active learning of statistical process control tasks.

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