(3) Events. Events are the scenarios or states of the environment not under
the control of the decision maker (that may occur). Uncertainty is
measured in terms of probabilities assigned to the events. Measurement
of uncertainty for each mode of transport, intermodal transfer and other
nodal activities is done via a confidence index. This confidence index is
based on a five point type scale: (1) = Almost no confidence; (2) = not
very confident; (3) = fairly confident; (4) = confident, and (5) = very
confident.