We introduce an efficient algorithm for determining a suitable
projection order for performing cylindrical algebraic decomposition.
Our algorithm is motivated by a statistical analysis of comprehensive
test set computations. This analysis introduces several measures on
both the projection sets and the entire computation, which turn out to
be highly correlated. The statistical data also shows that the orders
generated by our algorithm are significantly close to optimal.
This work was partially supported by the RAAG European RTNetwork RAAG,
contract no. HPRN-CT-2001-00271.