This volume, written by Brian Hall, presents an in-depth look at an integralpart of mining strategy optimisation - cut-off specification. The publicationbuilds a thorough understanding of cut-offs, covering simple concepts along withthe more complex and comprehensive models of cut-off theory and evaluationpractices. The first section of the volume addresses the principles underlying the more complex approaches to strategy optimisation; whilst the second sectiondeals with the finer details of conducting evaluations.