A random assignment study evaluated two welfare program case management approaches, traditional and integrated, and was conducted as part of the National Evaluation of Welfare-to-Work (WTW) Strategies, an evaluation of 11 welfare-to-work programs in 7 sites nationwide. More that 7,000 single parent welfare applicants and recipients deemed mandatory for Columbus, Ohio, WTW programs were randomly assigned to a control group or one of two programs that differed only in their case management approach during 1992-94. Some key findings were as follows: (1) integrated case managers provided more personalized attention and more closely monitored participation program activities; (2) the integrated program engaged more people in WTW activities than the traditional program; (3) sanctioning rates in the programs were similar and very high, with the rate of "initiating" sanctions higher in the traditional program; (4) the integrated program had higher two-year costs for employment-related services; (5) both programs increased recipient's earnings by 10 percent over the control group's; (6) the integrated program reduced payments more than the traditional; (7) both programs reduced welfare receipts and payments, with the integrated program reducing them more; (8) neither program increased recipients' average combined monthly incomes from earnings, cash assistance, and food stamps. (Appendixes include supplemental tables and 22 references.) (CLM)