Challenges faced in the evaluation of programs for the disabled are discussed, focusing on values orientation, key stakeholders, program structure, and measurement issues. Workers in the field are presently witnessing a fundamental change in the philosophy that underlies programs for persons with disabilities. Evaluators must be sensitive to the values orientation behind each program. Disability programs have multiple stakeholders, and an evaluator must identify key stakeholders and be responsive to consumers and their families. The shift toward community-based services is having an effect on program structure, and is increasing the number of small programs without the established hierarchical structure of larger human services programs. A final consideration is the measurement of program outcomes. Acknowledging multiple perspectives will require finding or developing multiple measures of program outcomes. These are exciting times for programs that serve persons with disabilities, but these advances require improved evaluation to ensure the best service delivery possible. (Contains seven references.) (SLD)