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1
Content available The identification of problems in production process using elements of second Toyota’s management principle – case study
Mielczarek Krzysztof
System Safety : Human - Technical Facility - Environment
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2021
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Vol. 3, nr 1
162--169
EN
The paper presents a case study of the practical use of BOST surveys to identify problems that are the most important in production process. The research object is company from electrical industry. It was made the identification and of areas geneating problems from the second Toyota’s management principle point of view. Analysis of the research results was presented in the form of tables, histograms, radar chart and some statistical tools. Some production workers of the company with the help of BOST questionnaire survey showed, which factors are the most important. The aim of the analysis is to present which factors are the most important by building the significance sequences of obtained results. The results obtained for the type of small and medium-sized enterprises overlap with the results of tests verified in other enterprises.
2
Content available Cost optimization and risk minimization during teamwork organization
Krynke Marek, Mielczarek Krzysztof, Kiriliuk Olga
Management Systems in Production Engineering
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2021
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nr 2 (29)
145--150
EN
In the paper the problem of personnel allocation under threat was presented. The possibilities of undertaking optimization measures in the process of workers’ health and safety and expenses incurred were emphasized. A mathematical model for this issue has been formulated. An algorithm solving the problem of staff allocation was presented. The evaluation criterion for this assignment was the minimization of worker safety risks. Simultaneous optimization of expenses incurred in the implementation of production tasks was taken into account. The productivity of the staff and all existing jobs with the skills of the employees also was considered. This problem was solved using GNU Octave. The example presented in the paper shows that in case of the most unfavorable allocation of tasks to employees, it will lead to a significant reduction in profits and may increase the risk of undesirable situations. The proposed analysis is the starting point for determining the risk in case of multi-position work.
3
Content available The improvement of production using elements of the Toyota’s house roof - case study
Mielczarek Krzysztof
System Safety : Human - Technical Facility - Environment
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2020
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Vol. 2, nr 1
333--339
EN
The article presents a case study of the practical use of BOST surveys to identify the most important factors in chosen enterprise. This article presents an analysis of the answers given to the question contained in the BOST questionnaire, refer-ring to the roof of Toyota’s house. Toyota’s management principles by Jeffrey Liker were pointed out, which refers to elements of Toyota’s house roof. Results of the survey were presented and the proposal to improving the processes in the enterprise. Research results were subjected to statistical analysis with a use of basic statistical parameters. It was made a correlation analysis connected with elements of the Toyota’s house roof. Evaluation structure was presented in a graphic form. Based on the survey results of carried out on the population of production workers, a series of importance areas for improvement was formulated. The aim of the analysis is to present which factors are the most important by building the significance sequences of obtained results .The results obtained for the type of small and medium-sized enterprises overlap with the results of tests verified in other enterprises.
4
Content available Assessment of production processes on the base of the second Toyota management principle - case study
Mielczarek Krzysztof
Quality Production Improvement - QPI
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2020
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Vol. 2, Iss. 1
238--246
EN
The article presents a case study of the practical use of BOST surveys to identify the most important areas in the production process. It was made the identification of areas from the second Toyota’s management principle point of view. This principle is based on the conviction that appropriate process leads to appropriate results. If the process is designed properly, then good results will come automatically. The research object is company producing the mineral water and carbonated drinks. Some production workers of the company with the help of BOST questionnaire survey showed, which factors are the most important. In frames of the work it was made short characteristics of the research object - producer of mineral water, the presentation of research methodology and content second Toyota’s management principle. Based on the survey results of carried out on the population of production workers, a series of importance areas for improvement was formulated. The aim of the analysis is to present which factors are the most important by building the significance sequences of obtained results. In the article were presented results of analysis with using some statistical tools. The results obtained for the type of small and medium-sized enterprises overlap with the results of tests verified in other enterprises.
5
Content available Evaluation of safety in the workplace importance in a company from metal products industry
Mielczarek Krzysztof, Toman Radek
System Safety : Human - Technical Facility - Environment
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2019
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Vol. 1, nr 1
962--968
EN
The article presents research results in a scope of evaluation importance of safety in the workplace in the production processes of enterprise from metal products industry. Toyota's management principles by Jeffrey Liker were pointed out, which refers to elements of Toyota’s house roof. An innovative BOST questionnaire survey was characterized as a tool for transformation of Toyota's management principles into questions. Research group which participated in BOST study from the metal product industry was characterized. Research results were subjected to statistical analysis with a use of basic statistical parameters. Research results showed that safety in the workplace is important factor in the company.
6
Content available Damage risk of the raceway edge arise in four-point slewing bearing
Krynke Marek, Mielczarek Krzysztof
System Safety : Human - Technical Facility - Environment
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2019
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Vol. 1, nr 1
632--638
EN
In the article some forms of damage to raceway of slewing bearings for single-row ball bearing slewing ring with four-point contact and their causes were shown. Changes of the contact angle and its influence on the geometry for contact zone of the rolling elements raceway were analyzed. An identification of changes for contact angle of individual balls for different parameters of the contact was received. It was showed that contact angles of some rolling elements were increasing. It can cause damage to the raceway by spalling or rolling out of edge of the bearing ring. Ways of avoiding too early damage to the raceway at the stage of the design and the selection of coronary bearings were suggested.
7
Content available Analysis of the problem of staff allocation to work stations
Krynke Marek, Mielczarek Krzysztof, Vaško Alan
Quality Production Improvement - QPI
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2019
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Vol. 1, Iss. 1
545--550
EN
The proper organization of work is to set the workflow to the slightest effort of man and machine operation to obtain maximum results. The article presents the problem of the allocation of personnel that occurs in a real company. The mathematical model for this issue was formulated. An algorithm solving the problem of personnel allocation is presented. The proposed analysis is a starting point for determining the production capacity and load of each workstation, which is particularly important when using multi-station work and balancing the production line.
8
Content available An identification of areas requiring improvement in the company producing the illumination – case study
Mielczarek Krzysztof
Quality Production Improvement - QPI
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2019
|
Vol. 1, Iss. 1
520--527
EN
The article presents a case study of the practical use of BOST surveys to identify the most important areas that require improvement actions. It was made the identification and of areas requiring improvement from the fourteenth Toyota’s management principle point of view. According to this principle it is crucial to determine the causes of problem by solving technical issues. The research object is company from illumination branch. Some production workers of the company with the help of BOST questionnaire survey showed, which factors can bring the best effect after being improved. In frames of the work it was made characteristics of the research object - producer of illumination, the presentation of research methodology and content fourteenth Toyota’s management principle. Based on the survey results of carried out on the population of production workers, a series of importance areas for improvement was formulated. The aim of the analysis is to present which factors are the most important by building the significance sequences of obtained results. In the article were presented results of analysis with using circular charts, box-and-whisker plots and some statistical tools. The results obtained for the type of small and medium-sized enterprises overlap with the results of tests verified in other enterprises.
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