Amjad Pirotti, Abolfazl Keshavarzsaleh, F. A. Mohd Rahim and Norhanim Zakaria
Although success is a word that encapsulates a general and wide idea and it is challenging to provide a definite and a consensus definition from all individuals concerned, for many years, there has been a growing interest in identification of the success factors and the relationship with project success. In this research, the main objective investigates the relationship between top management, project mission, personnel, communication and Schedule/Plan and project success in construction industry in Malaysia. A survey was conducted among Managers and Employees of construction companies registered with Construction Industry Development Board (CIDB) of Malaysia and the correlation and regression analysis was carried out in order to test the hypotheses of the study. Key areas are now offered that practitioners and academics should further explore to contribute to the knowledge body on project success and to explore in more details which factors affect project success in construction industry in Malaysia.
Currently entrepreneurs have the opportunity to use many methods and tools that support production management, quality and improvement of working safety. A method worth paying attention to is the 5S method, which brings order and discipline to the workplace. The article presents practical aspects of the implementation of the 5S method using five simple steps that give the real benefits to a company. Particularly the specific solutions that can be applied at every stage of the implementation of the 5S method is indicated. Also innovative ways of conducting internal audits are presented. In addition, a model for the implementation of the 5S concept was proposed, which supports maintaining the healthy standards at a high level. It has been pointed out that the implementation of 5S rules must be constantly monitored and improved. Therefore, supervision and motivational activities are particularly important, especially from the side of leaders and managers represented an organization.
Blanka Horváthová, Ľuboslav Dulina, Eleonóra Bigošová, Miroslava Barbušová and Martin Gašo
The issue of static load arises as a result of the optimization of activities and the natural development of industry towards digitization, implementation of technologies in the production process and elimination of manual work. Due to the inherent need to facilitate or completely replace manual work with machines, human activity focuses on the development, design, and management of these machines. This article presents the results of a survey of the representation of professions with the primary seated position in the selected industrial enterprise in comparison with the most frequently registered professions in specific sectors. Likewise, the authors also deal with the elimination of static loads arising from the performance of sedentary work through ergonomic chairs offered on the Slovak market. The paper presents the results of the market analysis focusing on the parameters of office chairs, which are marked as ergonomic or health. The findings of these surveys serve as one of the starting points for the design of a complex dynamic office workplace, which the authors deal with in research at the Department of Industrial Engineering at the University of Zilina.
The article presents the technologies of obtaining precious metals as a byproduct in the processing of copper concentrates in KGHM POLSKA MIEDŹ SA and in the processing of zinc and lead concentrates in Huta Cynku “MIASTECZKO ŚLĄSKIE”. Discussed technologies for recovery of silver from secondary raw materials such as: used silver catalysts, scrapped electronic devices, defective transistors, scrap of silver-plated glasses, used solutions used for processing photosensitive materials are discussed. Jewellery and tableware and technical coatings in electronics and electrical engineering. The high reflectivity of the light rays from the silver surface was used in the production of special reflectors and mirrors, and chemical resistance in the construction of apparatus (such as equipment resistant to molten hydroxide alkali metals).
In underground mines, where the deposit is located at considerable depths, mining shafts are key excavations. The project of making the deposit available requires selection of appropriate shaft sinking technology adapted to geological and hydrological conditions and natural hazards. Shafts can be made using the classic drilling and blasting technique or mechanical cutting of the shaft face. Mechanical cutting requires the use of a mining machine, which together with machines for loading and hauling the output and protecting the side walls is a shaft complex. Drilling using mechanized shaft complexes allows for high efficiency and work safety. To improve the efficiency of drilling, it is particularly important to implement many processes in parallel. The article presents an analysis of the progress of shaft sinking with a mechanized complex as a function of technical and organizational parameters. The analysis concerned a new generation cutting shaft complex, developed for the needs of shaft sinking for one of the Polish hard coal mines. The calculations were carried out for a shaft with a maximum diameter of 9.5 m and a total depth of 830 m. The article briefly presents a new solution for the shaft complex. There are presented results of calculations of daily drilling progress and total time of shaft sinking for the developed working technology of this complex. The efficiency of the complex depends on many factors related to technical parameters of individual machines and devices forming the complex and organizational parameters, hence a multi-variant analysis was carried out.
Hard coal mines and mining enterprises involved in hard coal exploitation in the area of the Upper Silesian Coal Basin (Górnośląskie Zagłębie Węglowe) are characterised by the presence of natural hazards typical of this type of exploitation. These hazards include the risks related to methane, coal dust explosion, endogenous fires, as well as rock burst and caving of roof rocks. The article presents the results of a taxonomic analysis aimed at determining the similarity of hard coal mines and mining enterprises in Poland in terms of the dangerous incidents caused by the risks related to methane, coal dust explosion, endogenous fires, as well as rock burst and caving of roof rocks. The analysis was carried out for the 2008-2018 data and encompassed a total of 26 hard coal mines and mining enterprises located in the Upper Silesian Coal Basin. The analysis was performed using the k-means method of non-hierarchical clustering. The main objective of the article was to determine homogenous groups (clusters) of mines exhibiting the greatest similarity in terms of dangerous incidents caused by the activation of natural hazards in the years 2008-2018. These data can be successfully used for the development of preventive measures and risk analyses for these enterprises.
The aim of the paper is to point out the principles of process management and selected quality management tools, which are aimed at improving the processes of the wood processing industries of the Slovak Republic. The knowledge from these areas is based on the analysis of the theoretical origins from domestic and foreign sources and supported by the results of the research carried out in the first half of the year 2017. In the processing of the results, classical methods of research work were used such as analysis, synthesis, comparison, descriptive statistics, contingency tables, chi-quadrat test and graphic depiction. Based on the analysis of the research results, there was a slight dependence between the process optimization levels in the timber industry and other process improvement methods such as statistical process control methods and graphical analysis and problem solving tools.
Making decisions is a process that involves taking into account n acceptable variants of undertaken actions in view of m adopted assessment criteria and selecting the optimal variant (optimal variants). Due to the number of alternatives being assessed and the number of considered criteria, more and more frequently mathematical methods are used in this process. Basing on the example involving the selection of a mechanized longwall complex, the article presents the application of selected multicriteria methods: in the case of quantitative features – Hellwig's development measure method, and in the case of qualitative features – Promethee II method. In the case of Hellwig's development measure method, equipment variants were interpreted as points w in the multidimensional space, and then the distances between them and the point Po (perfect solution) were determined. In the case of the Promethee II method (discrete multicriteria decision support method), the equipment variants were compared with each other in pairs, which made it possible to determine the so-called net flows Φ(i). The obtained synthetic values mi and Φ(i) allowed to build rankings of equipment variants (objects) and to indicate the optimal variant.
Production activities of companies significantly impact society and environment. It is high time to re-think many of industry’s practices and to change manufacturing processes in a way that allow the company to increase its competitiveness, while at the same time help to achieve sustainable growth. The sustainable production is a concept that is able to strengthen such transformation. The aim of this paper is to present empirical evidence of implementation of the sustainable production practices in the selected company from metal industry. The principles of the Lowell Center for Sustainable Production (LCSP) are used as a model to assess the main aspects of sustainable production in practices of the company. Empirical evidence shows that in each of the analysed issue some practices have been implemented, however there were identified some deficit areas. Therefore, at the end of the paper the improvements actions were proposed that could be implemented in the analysed company as part of the sustainable management programme.