Integrated Parametric Framework for Designing In-Situ Resource Utilization Capabilities in a Lunar Base Architectures

In-Situ Resource Utilization (ISRU) is expected to play a central role in enabling long duration human activity on the Moon. However, many mission and architecture studies still rely on simplified estimates or isolated subsystem models, making it difficult to assess how different ISRU technologies influence base-level power, logistics, and operations. This work introduces a modeling framework that uses Model-Based Systems Engineering (MBSE) and SysML to represent the entire ISRU chain from excavation through beneficiation, extraction, electrolysis, and cryogenic storage using parametric physics-based relationships. The model can switch between multiple extraction processes, such as hydrogen reduction, carbothermal reduction, and molten-regolith electrolysis, while maintaining a consistent set of assumptions and interfaces. Several example studies are presented to illustrate the capabilities of the tool, including subsystem power breakdowns, scaling of total power with production rate, and the influence of excavation throughput on system sizing. The framework can operate entirely within an MBSE environment or be linked to executable dynamic physics-based models through a lightweight data-exchange interface. These demonstrations show that ISRU can become a major consumer of surface power and a significant architectural driver. The approach provides a flexible and traceable foundation for future lunar-base studies and for comparing ISRU technologies within broader mission design contexts.