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  • Author: Krzysztof Mielczarek x
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Abstract

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, referring 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.

Abstract

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.

Abstract

In this paper TPM and PAMCO coefficients were shortly characterised. On the basis of TPM coefficients its effectiveness was estimated. Thanks to using time and PAMCO coefficients, the utilization of working time machines was researched. Moreover, there a correlation between TPM coefficient and the quality level was examined. A histogram was drawn up in order to illustrate the distribution. The obtained results allowed to evaluate the effectiveness of the machine. The period of research embraced fifty-two weeks (1 year) and the object of the analysis is the injection moulding machine.

Abstract

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.

Abstract

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.

Abstract

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.