This paper explores the integration of phase-based planning in the development and maintenance of railway infrastructure, with a specific focus on the Katni railway project. The study emphasizes the importance of strategic planning in optimizing project timelines, cost efficiency, and safety, particularly in large-scale railway projects. The research delves into the challenges faced in railway infrastructure development, including complexities in construction, maintenance, and resource allocation, and addresses how phase-based planning methodologies can provide effective solutions. Key aspects of railway infrastructure, such as the construction of ballasted track systems, the overhead catenary system (OHE), and maintenance practices, are examined to demonstrate their role in ensuring long-term performance and sustainability. The methodology section outlines advanced techniques in planning and categorization of maintenance activities such as routine, preventive, and predictive maintenance, along with the critical factors impacting railway track conditions. The phase-based decision support system is explored, highlighting its potential to streamline planning, mitigate risks, and ensure on-time project completion without accidents. The optimization of railway construction phases, through technical, economic, and constrained optimization models, is discussed in detail, showcasing the integration of operations research to enhance efficiency. The results of the study focus on the Katni Railway project, offering insights into the advantages of strategic planning, comprehensive execution, financial performance, and resource allocation based on phase-based planning methodologies
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