This session tackles the perhaps the toughest issue in evaluation – isolating the impact of a learning and development program on a business measure. While many programs are designed to influence business impact measures,the challenging question on the follow-up evaluation is this: How much of the improvement is caused by the program? Without a credible approach to this question, the evaluation study will be not credible and possibly invalid. In this session, we'll explore the different ways to achieve that through various exercises.