The project aims to develop and implement methods to enable a broad assessment and optimization of the Air Transportation System (ATS). At present, assessment is primarily accomplished by means of technicaland economic indicators based on the operator´s and manufacturer´s view. An approach has been being derived, to assess the ATS expansively regarding the three pillars of sustainability: economy, ecology and society. A framework is under development to conduct sustainability studies of ATS and its sub elements separately. The framework combines the Life Cycle Assessment (LCA), Life Cycle Cost Assessment (LCC) and Social LifeCycle Assessment (SLCA) to the Life Cycle Sustainable Assessment (LCSA) also known as Engineering LifeCycle Assessment. The framework is labelled as SEElab.
The additional objective is to extend the decision basis in applied methods by ecological and sociological criteriathat will be of decisive importance in the coming years (e.g. “green AC”, “alternative fuel”, “political impacts”,“community impact”,…). This approach requires the consideration of at least 4 influencing views:
Among others, an index has been derived which indicates the overall performance of the investigated systemin a highly aggregated number. The index is named Social-Eco-Efficiency-Index or abbreviated SEEindex.The SEEindex is the fina l output of a multi-step procedure which starts with the inventory of the environmental, economical and social impact and is finalized with a method to synthesis all different inventory results to onenumber. Here, the synthesis is conducted by a MCDA process whereas TOPSIS has been recommendedas the most fitting method to be applied.
Here the complete synthesis is conducted by a 4-fold MCDA process; executed for the economical, environmentalandsocietal column and finally for aggregating there results to one number. Latter is introduced as Social-Eco-Efficiency-Index or abbreviated SEEindex. MCDA is a process that allows one to make decisions in the presenceof multiple, potentially conflicting criteria. There are a variety of existing MCDA methods, thus the selection ofthe most appropriate methods is critical since the use of inappropriate methods is often the cause of misleadingdesign decisions. At this point it has to be differentiated between a post- and an in-loop assessment. In comparisonto the post assessment, where the alternatives have already been designed even introduced in the system beingevaluated, in the in loop assessment the alternatives can be re-designed for optimizing their sustainability. Therebyit depends on the question whether either the alternatives (e.g. aircraft, airports, airspaces or its sub elementssuch as an airport terminal or runway system) have to be optimized in respect of its economic, environmentalor social performance only or in all three sustainable dimensions.
The extended assessment needs the knowledge about the relevance of the criteria to be investigated. In general the relevance is expressed in weighting factors of the performance indicators. For the casethere is a lack of knowledge of the weighting factors, a procedure is proposed to perform sensitivity studies by interrelating the weight ratios of different performance indicators. The results are visualizedin a so called SEEtrade diagram. In SEEtrade the behaviour of the social-eco-efficiency vs. differentweighting of ecological and economical or social criteria is depicted against a selected weighting ratio ofperformance indicators such as emissions vs. land-use or energy consumption. It assembles the weight-dependent SEE-Indices of all examined alternatives in one picture.
Project partnersAirbus Operations GmbH,EADS Innovation Works,DLR Lufttransportsysteme (Project Management)Time: 31.12.2013