An Integrated Methodology for Space Systems Definition Integrating Strategic Gaps, Mission Lifecycle, and New Space Economy Drivers for a Lunar Rover concept

The transition towards an integrated space economy necessitates the development of formal methodologies that can coherently translate the strategic objectives of space agencies into viable, well-defined system concepts. This thesis proposes a dynamic, parametrically linked systems engineering (SE) framework designed as a decision-support model, which establishes a traceable 'golden thread' from high-level technology gaps to the conceptual design of a lunar rover system. The model begins with the selection and prioritisation of technological gaps, as stated by the ISECG Global Exploration Roadmap, using the Analytic Hierarchy Process (AHP) and links these needs to mission concepts. A mission lifecycle analysis then derives both the functional Operational Capabilities (OCs) and the critical Non-Functional Requirements (NFRs). A crucial step is the definition of a candidate set of system architectures (e.g., monolithic, modular, and swarm-based). These are then formally evaluated through a multi-criteria trade-off analysis, which systematically scores each architecture against a comprehensive set of criteria derived from mission performance requirements, operational constraints, and strategic drivers such as cost, reliability, and scalability, to select the optimal conceptual design. The framework's utility is demonstrated through a case study that validates the end-to-end process, resulting in a justified conceptual design and establishing a parametric baseline for informing future technology roadmaps.