Efforts to evaluate preventive health services delivery and case management systems were examined to identify potentially successful methodologies. A literature analysis was carried out in the two areas by structuring the program for early and periodic screening, diagnosis and treatment (EPSDT) into a hypothetical model defined by categories of eligibility, penetration, screening, diagnosis, treatment, and case management. Information was also sought on the effect of contractual relationships for services and of mixes of financial relationships in order to examine incentives available to service providers. The literature was also examined in terms of relevance to local, State, regional, and Federal needs. Each study is summarized and analyzed in terms of quality and relevance to EPSDT needs. Methods were sought, identified, and evaluated relating to identifying or estimating eligibles, penetrating the eligible population, moving recipients through the health delivery system, determining quality control, costs, and implications of screening tests, relating diagnosis to quality control of screening (including quality control for diagnosis), and relating screening to treatment and quality control of treatment and outcome. Study titles are listed with numerical codes referring to their summaries. A bibliography divided into the categories which define the EPSDT model and the compilation of literature reviews and evaluations in the two areas studied are appended. (NTIS annotation)