Scenario is a description

Abxfrac/--For the past decade, satcllite design has been an important discipline at thc Faculty of Aerospace Engineering at Delft Universiry of Tcchnology. A major change of tiit predominantly theoretical nature of the satcllitc projects camc into bcing in 2004. with thc completion of an in-house CIass 1UO.OOD Clean Room. Along with equipmcnt in laboraturics located at the Facult) of Electrical Engineering, this facility enables Delft University to not only design, but to actually produce and assemble a small student satellite in housc as well. Learning about this affordable access t o spaet, the space company Dutch Space approached tht Faculty of Aerospace Engineering to discuss the possibility to tcst a new type of thin film solar cells in the space environment. I n addition, the Dutch research inslilulr TNO Science LG Industry showed interest to join in with an autonomous Sun Sensor using a wireless link for data transfer. A third uew technology is an advanced high efficiency transceiver sized for application in picosnd nanosatcllites. With these three new technologim as primary payloads and the spacc proven CubeSat conccpt as a basic principle of design, the Delfi-C3 nanorntclliie is to be the first satellite that is designed and realized at Dclft University of Technology. The paper discusses thc Delfi-C3 mission and its design philosophy. Furthermore, B description of its subsystems snd payloads is given. Delfi-C3 is scheduled for a piggyback launch by the end of 2006.

las diferencias y similitudes entre ambas permanecen confusas.Varios autores han presentado a la Ingeniería de Requisitos como una evolución natural del Análisis de Sistemas, sin indicar en qué consiste esa evolución y cuáles son sus consecuencias. Quizás parte de la

Scenario is a description technique which has attracted much attention not only from practitioners but also from researchers. Literature on this topic shows the possibilities that this description technique provides to enhance the understanding of task-related descriptions and the communication among stakeholders. On the other hand, the idea of pattern, as a description of a problem which occurs over and over again in our environment and its solution, has also attracted lots of attention, specially in software design. This paper describes an initial taxonomy of domain-independent-scenario patterns and proposes a preliminary process to use this taxonomy for scenario construction.

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