<![CDATA[The rolling stock manufacturing industry, as part of the national strategic sector, is facing global challenges such as technological competition, price pressure, and increasing demands for operational efficiency. In this context, it is essential for PT Industri Kereta Api (Persero), the sole national rolling stock manufacturer, to formulate a business strategy that is both integrated and adaptive. This study aims to analyze the corporate strategy of INKA using the Diamond Strategy framework, which includes five elements: arenas, vehicles, differentiators, staging, and economic logic. A qualitative descriptive approach was conducted with a case study method, utilizing in-depth interviews, documentation, and literature review for data collection. The findings show that INKA's corporate strategy reflects all five elements of the Diamond Strategy, though with varying degrees of effectiveness. The elements of arenas and vehicles are implemented consistently, while staging and economic logic still require improvement in internal integration and resource allocation. These results highlight the importance of a cohesive alignment among strategic elements to enhance the company's global competitiveness. The implications of this study not only contribute to the theoretical development of the Diamond Strategy in the context of state-owned enterprises, but also offer practical recommendations for corporate leaders to build more responsive and sustainable strategies.]]>
