As part of its activities, Latitude develops advanced design methods for space launch vehicle structures. These structures are subjected to many load cases arising from the various flight phases, making it essential to use automated tools to efficiently select, combine, and process these load cases. The objective of this internship is to develop tools to assist with structural design, specifically enabling: the intelligent selection of load cases from a broad set; the implementation of combination methods (statistical, envelope, mechanical criteria); the integration of these methods into a user-friendly tool (scripts, simple interface).