This article describes a model developed by the Pennsylvania Department of Public Welfare, Office of Children and Youth, Bureau of Child Development Programs for the evaluation of its child day care programs. The evaluation effort has two phases. The first phase, the Child Development Program Evaluation (CDPE) was designed to provide a standardized system for the assessment of 16 components of the day care delivery system. Three instruments were produced to assess compliance with federal requirements, state standards and professional recommendations. The second phase, the Ecological Paradigm for the Delivery and Assessment of Child Care (ECOPAD), is designed to provide the accountability needed in the Bureau of Child Development Programs. The emphasis of this model is to integrate data across three component areas: program services, statistical reporting and fiscal costs. Use of the CDPE and ECOPAD in combination is thought to provide a relatively objective evaluation of the total impact and cost of a social services program. (Author/RH)