The high level of competition in the manufacturing industry requires the creation of working conditions that allow for the efficient implementation of production processes. One of the solutions enabling the adaptation of production stations to improve the work performed by employees is the implementation of a management system based on the Lean Manufacturing (LM) philosophy. The purpose of this article was to determine the potential impact of the implemented LM tools, in the form of 5S and standardization, on the efficiency of the production process in specific production conditions. The methodology of the conducted research included: obtaining data before and after the implementation of LM tools (in total 12 months). The data was used to determine the effectiveness of individual operations, and then to conduct a comparative analysis using statistical tests. It was found, among others, that the implementation of LM tools resulted in an increase in the efficiency of the manufacturing process by about 11 percentage points. The obtained results confirm the thesis that a manufacturing company, in order to maintain its position on a competitive market, can improve the efficiency of processes by using tools such as LM. The selection of tools must be adequate to the implemented processes, so that they bring measurable increase in efficiency.

Shaping safe and hygienic working conditions is the basic obligation of the employer. Employers are still looking for methods, tools, and solutions to improve work safety. The study reviews the literature on solutions aimed at improving occupational safety in construction. For this purpose, bibliometric analysis was used, consisting of the exploration and analysis of scientific studies in the field of occupational health and safety, including the possibility of using the LM tool to improve working conditions on construction sites. The study presents the possibility of implementing Lean Manufacturing (LM) tools in the construction industry. Their strengths and weaknesses were identified, and the benefits and possible barriers related to their effective implementation/use were identified. The result of the analyses was a summary of benefits for the construction industry (strengths and opportunities) as well as areas requiring improvement (weaknesses and hazards) regarding the LM tools used. Based on the conducted analyses, it was found that it is possible to use the tools of the LM concept to improve work safety and organize tasks performed on construction sites. The implementation of LM tools, such as 5S/6S, Poka-Yoke, and Standardization, enables risk reduction through a direct impact on the area being analyzed, in which occupational hazards have been identified. It is also noted that there is a need to simultaneously use LM tools (VM, Gemba-Walk, DHM) as solutions aimed at reducing risk.

With the growing trend towards the electrification of transport, it is anticipated that internal combustion engines will continue to play an important role in the production of electricity for electricity systems or the direct propulsion of vehicles. However, these engines are under considerable pressure to achieve carbon neutrality, making zero-emission fuels a key solution. One solution is the use of hydrogen, which is an extremely clean and carbon-free fuel whose combustion product is only water. The paper also introduces the KEYOU concept, which involves switching from burning propellant oil to a supercharged, lean-burn, hydrogen-fueled ignition engine. The authors provide a study on the selected issues based on 113 reviewed literature sources and highlight the achievements and potential of hydrogen engines. Based on the achievements described, the paper provides a comprehensive overview of the impact of hydrogen engines in reducing emissions as well as supporting the sustainable development of transport systems. The literature research conducted highlights hydrogen as an important solution for decarbonizing internal combustion engines and moving towards an emission-free future.

Organizing manufacturing work in a way that minimizes delays in individual production operations is a key factor in a highly competitive market. One of the key factors to prevent delays is their correct identification and proper definition of methods to reduce their impact on selected parameters of the production process. The study presents the impact of Lean Manufacturing tools (5S, standardization and Total Productive Maintenance) on delays in the manufacturing process. A statistical analysis of the level of delays was performed, which was aimed at showing the essence of using Lean Manufacturing tools to improve the efficiency of the production process. In the example analyzed, the implementation of selected LM tools allowed for a reduction of delays related to failures by approximately 18 hours.

Computer simulation is one of the tools that is often used to support activities related to the management of the production process. Computer simulation allows for the analysis of the parameters of production or logistics processes, among others. The study presents a comparative analysis of analytical methods and computer simulation (FlexSim 22.2.1 software) in relation to the subject matter. The use of computer simulation allowed for the verification of the number of production resources, determined by analytical methods, and for the proposal of improvements that would allow for shortening the duration of the production process and reducing its costs. The proposed improvements at the stage of planning the production process in terms of the number of production resources used to implement the assumed production plan allowed for the reduction of the duration of the production process and its costs. Therefore, it is justified to use computer simulation in solving problems related to various aspects of the functioning of an enterprise.

Production planning in terms of defining the number of resources necessary to execute the production plan in a precisely defined time is a complex task. The complexity of the planning process results from the large number of variables affecting the production process. Planning the production process in such a way as to shorten its duration, reduce costs and at the same time ensure the appropriate quality of the product determines the competitiveness of a given company on the market, which is a key factor today. The aim of the article was to present the justification for using simulation software as a tool supporting decision-making in the field of selecting the appropriate number of production resources necessary to implement the assumed production plan. The subject of the research was the actual production process (case study). For the purposes of the research, a five-stage methodology was developed, the effect of which was to conduct a computer simulation of the production process. The obtained results allowed to indicate the best of the analyzed solutions, ensuring reduction, among others, of the duration of the production process and the costs generated by it. The analysis confirmed the justification for using computer simulation in planning production processes as a tool supporting decision-making.