  An analysis is made of a moving disturbance using a directed cyclic graph.
  A statistical approach is used to calculate the alternative positions in
space and state of the disturbance with a defined observed time. The
probability for a freely moving entity interacting in a particular spatial
position is calculated and a formulation is derived for the minimum locus of
uncertainty in position and momentum. This is found to accord with calculations
for quantum mechanics. The model has proven amenable to computer modelling; a
copy of the "SimulTime" program is available on request.
