Common Questions and Concerns  The discussion is focussed on the
following questions:    1. What is the improvement in the
understanding of the data as compared to the situation without
visualization?   2. Which visualization techniques are suitable
for one's data? Are direct volume rendering techniques to be
preferred over surface rendering techniques?   3. Can current
techniques, like streamline and particle advection methods, be
used to appropriately outline the known visual phenomena in the
system?  The success of visualization not only depends on the
results which it produces, but also depends on the environment
in which it has to be done. This environment is determined by
the available hardware, like graphical workstations, disk space,
color printers, video editing hardware, and network bandwidth,
and by the visualization software. For example, the graphical
hardware imposes constraints on interactive speed of
visualization and on the size of the data sets which can be
handled. Many different problems e