  The production scale and internal structure of jets produced in high energy
collisions are studied using Jetset7.4 and Herwig5.9 Monte Carlo generators.
Two scales are found. One is the jet-development scale, which determines the
size of the jet developed from a mother-parton. The other one is the
jet-production scale, the jets produced with this scale are the most consistent
with QCD jet-production dynamics and will provide the most reliable dynamical
information about their mother-partons.
