Construction of the Evaluation System for the Manufacturing Technology of Launch Vehicle Body and Its Application in the Evaluation of Sheet Metal Technology

The development of launch vehicle technology reflects a nation’s technological strength. This study proposes a comprehensive evaluation system based on an "input-output" framework across four dimensions: technological resources, capabilities, benefits, and social and environmental impacts. By integrating the analytic hierarchy process (AHP), expert weighting method, and entropy weight method, the weight of each indicator is systematically determined, and grey relational analysis (GRA) is applied for comprehensive evaluation. Finally, sheet metal related technologies at Company T are used as a case study to validate the feasibility and effectiveness of the proposed evaluation system and methodology. This evaluation framework provides a systematic methodological foundation for assessing and selecting future rocket manufacturing technologies while offering valuable theoretical and practical references for the technological evaluation of China's aerospace industry.