Objective 3: development of a decentralised decision model, encompassing all actors involved in the implementation strategy of a retrofit measure, from different backgrounds: geophysics (engineering seismology), (structural) engineering, architecture, economy (investment efficiency) and sociology (consideration of user issues).


Modularisation of a collaborative decision model taking into account non-measurable criteria.


In the original proposal the use of the pair wise comparison method was foreseen. This method, originating from Saaty, has lead to a multiattributive decision system as shown by the „balancing method“ of Prof. Strassert at the University of Karlsruhe. Further decision-making on two different levels (level of the actors, level one actor’s criteria) will be investigated, as well as the likelihood of interference with multiobjective systems in the transition from urban to building scale. The focus laid of the principles of balancing and criteria measurability across different disciplines.


The pair wise comparison method was not used, but instead a detailed decision tree has been developed. The decision tree displays two levels: the level of the actors and the level of the actors’ criteria. This decision tree has been employed in order to evaluate the retrofit methods considered in the simulations performed for objective 2.


The main result at this objective is the decision tree itself. A weighting of these objectives can be seen in the publication “Regression based criteria determining for preservation strategies of early reinforced concrete buildings” (publication C9). The decision tree as such was part of the presentation at the 7th International ROSE Seminar and will be published in the upcoming special issue of the Journal of Earthquake Engineering. The decision tree is contained and explained also in the authored book on “Applicability and economic efficiency of seismic retrofit measures on existing buildings: the case of Bucharest, Romania” (publication B1).


The discussions with the host helped to clarify the objectives of the structural engineer.


Decision making is an important research area. Also, this objective provides an interface to decision makers in seismic risk management.