A practical French-language study guide for candidates preparing the note de synthèse component of competitive examinations. The work focuses on helping applicants understand the expectations of this written test, organize source material efficiently, and produce a clear, coherent synthesis under exam conditions. With its concise format and exam-oriented approach, it is intended as a preparation tool for candidates facing concours-style assessments, including public-service or technical-administrative examinations. The title suggests particular relevance to the concours externe d'ingénieur subdivisionnaire, while the guidance may also support broader preparation for written synthesis tasks in French competitive selection processes.