The San Diego (California) Saturation Work Initiative Model (SWIM) was part of the Social Security Administration's two-site demonstration of saturation work programs in an urban area. The multicomponent program operated from July 1985 until late 1987, when it was replaced by a new statewide initiative called the Greater Avenues for Independence (GAIN) program. The model was designed to test the feasibility of requiring the continuous participation of welfare applicants and recipients in a series of work-related activities for as long as they remained on welfare. The program activities included job search, work experience, and referral to education and training programs. The program was examined from the standpoint of two perspectives--the extent to which the full Work Incentive (WIN)-mandatory caseload was involved in employment-related activities at a particular point in time and the continuity of individuals' participation in the program. During typical months of the demonstration, approximately half the WIN-mandatory caseload subject to the participation requirement was active in one of the program's components. Although many program eligibles did not participate on a continuous basis, it was concluded that San Diego reached the maximum feasible participation rates for the type of program in question. (MN)