The implications of a mandatory pupil assignment desegregation plan for the racial composition of the School District of Philadelphia are assessed in this report. The first section of the report reviews desegregation literature relating to mandatory pupil assignment. Virtually all of the research indicates that mandatory white reassignments significantly accelerate white flight, but the magnitude of white flight is dependent upon demography, geography, program choices, and attitudes. The second section of the report presents new findings on the desegregation attitudes and program choices of parents in six selected elementary schools in the Philadelphia School District. Among the factors considered in the analysis were: parents' race, level of education, and desegregation condition of their child's school. The three school desegregation conditions present in the district at the time of the survey were: (1) schools with voluntary desegregation programs; (2) schools identified for pairing to achieve desegregation; and (3) schools neither experiencing nor being considered for desegregation. Among the major findings reported are the following: parents are generally in favor of school desegregation and district programs and services; voluntary desegregation strategies are favored by the majority of parents; the quality of education in the school was characterized as being more important than desegregation; and parents were overwhelmingly pleased with the schools their children attend. The report concludes that the basic result of a mandatory plan would be increased white flight. Survey results are presented in tabular form in an appendix. (KH)