It is shown, on examples, how to compute the balance set and the balance nu
mber in Vector Optimization Problems (VOPs) of different nature. New develo
pments are presented concerning possible interrelation between the balance
set and the balance number, a new notion of the projection of the balance s
et onto the parameter space, new approaches for solving VOPs with unbounded
objective functions, and some approximation techniques in determining the
balance set. (C) 1999 Elsevier Science Ltd. All rights reserved.