This document discusses training evaluation models. It begins with introducing training and evaluation concepts. It then describes Kirkpatrick's four-level model of training evaluation that measures reaction, learning, behavior, and results. The document also discusses Jack Phillips' five-level ROI model that adds return on investment. It notes some defects in these models and proposed improvements like measuring performance instead of behavior and motivation instead of reaction. The document concludes with discussing Intel's application of evaluation after training and findings from studies on training costs and popular evaluation techniques.