For some management applications@ activities and/or operations have to be scheduled. This scheduling can be dependent of various factors (e.g. time of day@ type of day) and it can be repeated (e.g. daily@ weekly@ bi-weekly). Scheduling activities can also require more information than a simple on/off scheduling@ if e.g. the scheduling can select one out of three or more alternatives. To manage this type of scheduling a generic solution needs to be applied. This solution shall be useful for a number of different management applications. The scope of this standard is to model the support functions for this generic solution at the Network Elements/Operation System interface. Requirements for temporary override and automatic/manual fall-back to a previous management schema are outside the scope of the present document.