Scheduling tasks, created during the planning phase, are widespread in project and operational activities. One of the key factors in improving of planning accuracy and the balanced plans formation, work schedules is the assessment of their duration implementation, as well as rationing. The exact calendar planning and scheduling for production, design and organizational activities should include the use of prohibitions for certain time periods of work. These could be weekends (Saturday, Sunday), holidays, or simply periods of forced downtime, when for some reason it is not possible to use a certain time for planning work. An algorithm for constructing schedules under conditions of interruptions (prohibitions of work) in certain time intervals is considered. The article presents approaches to normalization based on the use of the precedent method and restorative-predictive normalization. A general approach to solving the task is also considered, with prohibitions on individual time intervals of work.