LU TP 00-53 hep-ph/0012187 December 2000 QCD Radiation off Heavy Particles T. Sjöstrand An algorithm for an improved description of final-state QCD radiation is introduced. It is matched to the first-order matrix elements for gluon emission in a host of decays, for processes within the Standard Model and the Minimal Supersymmetric extension thereof. To appear in the Proceedings of the Linear Collider Workshop 2000, Fermilab, October 24-28, 2000