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Design of a method for measuring the leanness level of production processes
Medonos, Michal ; Blecha, Petr (referee) ; Čambál, Miloš (referee) ; Lenort, Radim (referee) ; Jurová, Marie (advisor)
Focus of this dissertation thesis is to find suitable methodology for measuring the leanness of the production process. The history of approaches to the optimization of production systems is outlined in the literature search. Furthermore, the methodology of lean production is described, the concept of leanness of the production process is defined and also the current approaches and methods of measuring the leanness of the production process are summarized. The next section presents developed Lead Time Leanness Indicator as a proposal for a suitable way to measure the leanness of the production process. Within the primary research, the necessary data are obtained from production companies using a questionnaire survey to test the usability of this indicator in practice. Based on the evaluation of the results of this survey, all established hypotheses are confirmed, and it can be stated that the defined indicator and its methodology is a suitable tool for measuring the leanness of the production process. It is further confirmed that this indicator can be used to set goals for the implementation of the lean production methodology also for a mutual evaluation and comparison of the efficiency of production processes of different companies. Another benefit obtained from the questionnaire survey is the mapping of the current state of the level of leanness of production processes and the intensity of the use of lean production tools in production companies not only in the Czech Republic but also abroad. At the end of the work, a case study is presented, which demonstrates the use of the indicator to determine the current state of leanness of the production process and to define any potential for improvement in a particular manufacturing company.
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Quality assurance in the production of lubrication aggregates
Karbus, Filip ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
This bachelor thesis is focused on quality assurance of lubrication aggregates in the company Tribotec, spol, s.r.o. The main objective is to propose a solution leading to the reduction of the number of non-conforming pieces in production by applying quality assurance tools. The introductory chapters describe the basis of quality management, quality assurance of lubrication aggregates in the cooperating company and the quality tools used to reduce non-conforming pieces. The application of these tools is based on two weeks of observation. The next section includes a description of the technical equipment and an analysis of the lubrication aggregate manufacturing process. The main contribution of this paper is a suggestion for process modification in the assembly of lubrication units. The proposed measures led to a reduction in the number of non-conforming pieces.
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Calender operation safety in rubber industry
Darvaši, Martin ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
This bachelor's thesis deals with legislative requirements for the safe production and operation of machinery in the territory of the European Union. It describes the most significant European directives in this field and explains their importance for machinery manufacturers and operators. An overview of harmonized standards and their application is also provided in the thesis. Furthermore, a risk assessment of a rolling machine in operation on the territory of the Slovak Republic is conducted. This section elaborates on the issues related to operating older machines.
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Fencing design and risk analysis of a robotic workplace
Piech, Zbyněk ; Blecha, Petr (referee) ; Szabari, Mikuláš (advisor)
Presented master thesis is focusing on design of fencing for robotic workplace. Such robotic workplace is used for manipulation with pieces of sheet metal. In the first part, the analysis of current legislative requirements is provided together with hazard identification and recommendations for lowering the risk. Second part is focusing on application of such recommendations, therefore the fencing design of the robotic workplace is presented, coupled with the selection of the manufacturer and design of the placement of the fencing and further safety elements. Bill of materials and economical evaluation is made.
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Safety of the gantry-type machining centre
Pejchal, Viktor ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
The bachelor's thesis deals with the safety requirements of the harmonization legislation EU of the portal machining center. Within the specific machinery, a list of relevant harmonized standards, a list of possible hazards and an overview of calculations with a particular calculation of the safe cover thickness is prepared.
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Safety assessment of a multifunctional machining centre
Šponiarová, Petra ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
The thesis deals with the safety of the multifunctional machining centre of TOS KUŘIM – OS, a.s. In order to assess the safety of the multifunctional machining centre and the safety of the workers involved in its manufacture and assembly, it was first necessary to familiarise ourselves with all the legislation, which includes EU harmonisation and OSH legislation. Harmonised legislation is followed by harmonised technical standards. Compliance with the basic safety requirements of the relevant harmonised standards is a prerequisite for meeting all the requirements of harmonisation legislation. One of the basic requirements before placing a product on the EU market is to carry out a risk analysis. This has been done by correcting and supplementing the risk analysis of the milling machining centre, on whose design the analysed machining centre is based, to meet the requirements of ČSN EN ISO 12100:2011. Particular attention was paid to the production and assembly stage, where several standard production and assembly procedures were selected. Flow charts were drawn up for these selected procedures and a risk analysis was carried out using the FMERA method, which was developed by modifying the FMECA method. For each risk, measures were proposed to ensure that it was reduced to an acceptable level.
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Reliability issues in the development and production of control systems
Králíčková, Dominika ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
The master thesis deals with the reliability issues in the development and production of control systems. First, the company UNIS, a.s. is described with an emphasis on the Division of Aviation and Advanced Control. A list of ways of managing the organization, which deals mainly with the positive features of process management and the creation of process maps. The following is an analysis of business processes from the quality management system in the company UNIS, a.s., through the current overview of processes and controlled documentation to the basic processes of the Division of Aviation and Advanced Control. Then the development and production processes are analysed in detail. This is followed by a system analysis of the issues addressed, which describes, how is it appropriate to proceed with process management and why. There are also FMEA and FTA methods, which are further applied to determine the current state of processes in UNIS, as. The FMEA and FTA methods resulted in findings that are discussed in the next recommendation. Finally, the achieved results are evaluated.
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Internal product and machine release at Bosch Jihlava
Vejtasová, Vendula ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
This thesis deals with the internal release of products and machines at Bosch Diesel Jihlava. Due to the variety of products that are produced in the Jihlava plants, the thesis focuses only on the internal release of one product, namely the fuel return line. To place the issue in a broader context and to understand the external influences acting on the processes, a system analysis is performed using a process map and Ishikawa diagrams. The evaluation of both processes is carried out in the form of a SWOT analysis, which allows to find strengths, weaknesses, opportunities, and threats. As a result of the work, four improvements are proposed that can make both processes more efficient, especially in terms of time and systems. For a deeper understanding of the issue, a theoretical part is included in the thesis.
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Cybersecurity in the engineering industry
Jemelíková, Kristýna ; Blecha, Petr (referee) ; Maradová, Karla (advisor)
The master’s thesis deals with the management of cyber security in a manufacturing company. The theoretical part contains concepts and knowledge of cyber security and discusses the current requirements of legislation and standards of the ISO/IEC 27000 series. In practical part are proposed measures to increase cyber security and information security based on the theoretical background and analysis of current state in the selected company.
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Reliability assessment of a hydraulic switchboard production proces
Machová, Lenka ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
The Diploma thesis is focused on possibilities of an assessment of a hydraulic switchboard and its manufacturing process. Furthermore, it analyses methods individually which are suitable for quality assurance and production reliability, which are described in details. The follow-up work focuses more on the Statistical Process Control (SPC) method which is applicable in the early warning system and the Failure mode, effects, and criticality analysis (FMECA) method, applicable in the planning system. These two methods are further applied to the newly introduced process of machining the hydraulic switchboard as an effective tool not only for assessing the reliability of production, but also for its subsequent securing and maintaining in a relevant condition.
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