Maintenance management plays a key role in many industries, as maintenance determines the availability of systems, influences their lifespan, impacts customer satisfaction, and as a result affects overall investment profitability. In this context, the aviation industry seeks models to improve efficiency. Researchers seek to provide conceptual models that help to shape the industry’s operations. Spare parts management plays a fundamental role in aviation, considering the predominance of planned maintenance. In this study, we analyzed the impact of the distribution network design for spare parts management and the fixed and dynamic planned maintenance intervals on the overall efficiency of an aircraft fleet. We present a conceptual model considering a variety of topics, such as distribution network design, that have been managed to a limited extent based on maintenance management. A simulation model was developed by applying the conceptual model for the aviation industry considering an aircraft fleet over its whole life cycle. The simulation model provides results concerning the impact of the distribution network, maintenance intervals, and other key factors on the efficiency of the aircraft fleet. The simulation enables a comparison of different distribution networks and maintenance strategies to decide which of them is the best fit for each spare part. The approach we propose enables companies and managers to make decisions informed by a centralized tool with all the relevant factors concerning the maintenance management of an aircraft fleet over its life cycle. As a result, managers are provided with a conceptual and simulation model for the assessment of future what-if scenarios based on aggregated databases from multiple sources without delays and with a dynamic vision of the relevant relationships between factors.
Historically, manufacturing system researchers and managers have often failed to consider all the areas, factors, and implications of a process within an integrated manufacturing model. Thus, the aim of this research was to develop an integral modeling approach for manufacturing processes in order to assess their status and performance. For this purpose, a novel conceptual model consisting of an integral definition of areas and flows is applied. As a result, manufacturing systems can be modeled, considering all related flows and decision-making options in the respective areas of production, maintenance, and quality. As a result, these models serve as the basis for the integral management and control of manufacturing systems in digital twin models for the regulation of process stability and quality with maintenance strategies. Thus, a system dynamics simulation model is developed for a metallurgical process. The goal of the simulation model is to provide a digital manufacturing system regulated with different maintenance, quality, and production strategies in order to secure quality and delivery service. The results show how the monitoring of all flows together with the optimal strategies in the quality and maintenance areas as a result of a regulated system can enable companies to increase their profitability and customer service level. In conclusion, the applied simulation case study allows better decision making, ensuring continuous optimization along the manufacturing asset lifecycle and providing a unique selling proposition for equipment producers and service engineering suppliers, as well as for production and assembly companies.
Self-protection plans are the fundamental tool established to prevent and control the risks that threaten people and assets. In turn, they are essential to provide an adequate response to possible emergency situations that may occur in public or private buildings, facilities, or events. In this context, current and future challenges advocate increasing the usefulness, versatility, and adaptability of self-protection plans. For this purpose, this paper aims to develop a conceptual model for the project management of self-protection plans with a lifecycle approach. The research provides results concerning guidelines, aspects, and potential regulations, technologies, tools, methodologies, and maintenance frameworks to be followed for any building in different project phases. The methodology followed has consisted of a process in stages, with literature review and a conceptual development to obtain an adaptable model to any public building. The adaptability of the framework relies on the definition of potential methods, information systems, and technologies that can support any phase during the Self-Protection Plan life cycle. Moreover, it was applied in a specific environment, such as in public buildings under the Spanish regulation using the most common tools and applications available. Results proved that although it is possible to make a base model applicable to any publicly owned building, there is an extensive and precise subsequent work of adaptation to specific cases in which the applicable legal framework makes this task challenging. Finally, the results obtained have allowed us to reflect on future research needs.
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