A rapidly growing change in the workplace is the replacement of a fixed work schedule with a variety of alternative work schedules (AWS), including both flexible and compressed schedules. Experimenting organizations (N=901) evaluated one of four major categories of AWS in office and nonoffice settings, i.e., a flexible 8-hour day; flexible-variable hour day which allows employees to vary length of work day as well as arrival and departure times; four 10-hour days (4-10); and 5-4/9 in which an employee works eight 9-hour days and one 8-hour day in a biweekly pay period. Each group completed questionnaires summarizing the results of their AWS experiments. Analyses of questionnaire responses in three categories (productive, overall success or failure, and use of short term sick and vacation time) showed that a majority of all experiments were judged successful. Office and non-office settings showed little difference except for the 5-4/9, which was least successful in office settings. The two compressed schedules had more failure than the two flexible types. Reduction in short term leave use was reported for all schedule types. Approximately 40-50% of the experiments reported increases in productivity, and 5-10% reported decreases. Compressed schedules in office settings were most likely to produce decreases. Results suggest that compressed work schedules are more sensitive to the work setting but the AWS does have positive effects for most types of organizations. (MCF)