ABSTRACT
This part contains a collection of papers relating the general them of uncertainty either in terms of validation or non-deterministic cost modelling. The papers dealing with validation use an essentially black box approach to quantify the performance of models through their accuracy, the more recent work concentrating on the human aspects involved. The modelling papers range from the straightforward use of probabilistic and stochastic simulation to the application of fuzzy set theory and the use of dynamic modelling to incorporate feedback.
