Ship cost estimation is a specialized domain within engineering economics and management science concerned with predicting the financial expenditure associated with the design, construction, acquisition, operation, and maintenance of marine vessels. This field employs analytical methodologies to model and forecast expenditures across the ship's lifecycle. It investigates the complex interplay of technical specifications, operational requirements, lifecycle stages, economic conditions, and programmatic factors that drive the total cost of ownership for ships. Key characteristics include the application of diverse quantitative and qualitative methodologies, such as parametric modeling, historical data analysis, and detailed engineering estimates, often applied at various stages of the procurement and operational lifecycle, from early conceptual design to ongoing sustainment. Its significance lies in providing critical financial insights for strategic planning, budgeting, risk assessment, and informed decision-making within maritime industries and defense sectors responsible for naval acquisition and fleet management, thereby enabling effective resource allocation and program viability assessment.