The German Aerospace Center (DLR) has initiated the project Quiet Short Take-Off and Landing (QSTOL) to set up a
multidisciplinary analysis process for new low-noise STOL transportation concepts. The process chain consists of expert
tools from various DLR institutes and their partners which are harmonized in input and output data. Involved disciplines
are aircraft design, engine cycle modeling, flight mechanics, air traffic integration, and noise prediction. The influence of
aircraft design modifications on flight performance/operational procedures, ground noise impact, and air traffic intergration
can be evaluated. Obviously, these diciplines are highly correlated and need to be integrated into one multidisciplinary
process. The implementation of this new process along with first applications are addressed in this paper. A conventional
medium-range transport aircraft is modified for QSTOL operation. Structural modifications of the airframe and a geared
turbofan engine concept are investigated. The effects of these measures on ground noise impact, field performance, and
air traffic integration are discussed
