In the contemporary defense industry, the procurement of complex aircraft components transcends mere cost-efficiency, evolving into a multidimensional strategic imperative critical to national sovereignty. This study proposes a robust Multi-Criteria Decision-Making (MCDM) framework designed to optimize "make-or-buy" configurations for aerospace components within the defense sector. The model integrates quantitative operational metrics—such as unit cost, production capacity, and workload volume—with qualitative strategic determinants, including technological competence, specialized labor force, and strategic criticality. Recognizing that standard operational conditions are increasingly disrupted by geopolitical tensions and systemic uncertainties, the proposed model evaluates decision stability across three distinct scenarios: a baseline "Business-as-Usual" scenario, an "Embargo/Sanctions" scenario, and a "Systemic Financial Crisis" scenario. By employing sensitivity and scenario analyses, this research elucidates the shifts in criteria weighting and the resultant volatility of optimal sourcing decisions. The findings provide decision-makers with a resilient and adaptive roadmap, ensuring procurement strategies remain robust against external shocks while safeguarding technological autonomy.

Keywords                                                                                             

Make or Buy Decision, MCDM, Defense Industry, Aircraft Components, Scenario Analysis.