This paper focuses on studying the incidence of different types of activity-scheduling decisions, using data from a computerized activity-scheduling survey (CHASE) conducted in Toronto, Canada. Several decisions are studied: with whom the activity takes place, location of the activity, the time planning horizon, and modification or deletion of activities during the scheduling process. The results from a multivariate probit model show that several characteristics of the planned schedule and planned activities are most important in explaining the decisions made during the scheduling process. Individual and household characteristics also play an important role. Significant correlations among the planning decisions suggest that the process of activity scheduling occurs with a high degree of endogeneity.