ABSTRACT
ThepresentedConfiguration, Evaluation andSelection Tool (CES-Tool) for tunnel construction methods with the intended target means relationship is constructed as an actional, generically-deductive model (tool) by following the constructivist research paradigm (Piaget 1973, Glaserfeld 1998, Girmscheid 2007). The scientific quality is achieved by triangulation (Yin 1994) due to:
– viability of the actional, generic-deductive model, – validation through a theoretical framework and – reliability through testing the intended impact
(target-means-relation).
