A Kiviat graph is a multi-vector line graph for showing how
multiple variables interrelate. For example, if you have 5 factors
(speed, risk, cost, innovation, quality in Lyytinen and Rose 2005
http://portal.acm.org/citation.cfm?id=1148996), as speed increases,
it has an impact on risk, cost, innovation and quality. You can
show this interrelationship as a figure that moves up and down the
5 axes of a Kiviat graph.