This symposium on assessment and evaluation modeling consists of three presentations. "Training Assessment Among Kenyan Smallholder Entrepreneurs" (George G. Shibanda, Jemymah Ingado, Bernard Nassiuma) reports a study that assessed the extent to which the need for knowledge, information, and skills among small scale farmers can promote effective management of the off-farm enterprises. It recommends business counseling as an integral part of extension education. "Business-Focused Evaluation: A New Collaborative Model" (Valerie Stead) presents a case study of a business-focused evaluation model developed as part of an organizational development intervention for a global semi-conductor company. It assesses the model's value against three principles concerning collaboration, joint ownership, and integration drawn from client and provider needs and current thinking in evaluation research. "Challenges in Measuring and Evaluating Diversity Efforts in Human Resource Development" (T. Marshall Egan) examines challenges faced by practitioners and scholars interested in evaluation and measurement of diversity efforts in organizational contexts. It considers an organizational systems model illustrating the diversity-related interchanges between an organization and the macro environment and examines challenges to measurement and evaluation due to the latency of the diversity, performance, and performance improvement constructs. All three papers include substantial bibliographies. (YLB)