ISSI-BJ Space Science School is a biennial school for international students dedicated to the research of space sciences and space science missions' topics. It teaches students to draw connections and links between scientific objectives and requirements, missions and spacecraft design, and mission costs. In other words, its aim is also to adopt a comprehensive approach for the successful design of space science missions. The students are in fact provided with the required scientific background relevant to produce a report outlining a possible space science mission concept.