Specify Period Groups (if applicable). Refer Period Group Setup.

At this point specify or omit a Period Group or Groups as applicable. Omitting a Period Group would prevent maintenance firing during a particular period or periods. For example, it may not be practical in some countries to perform maintenance in Winter due to extreme weather conditions (e.g., snow and cold). If the Winter period group was deselected, the maintenance setup would not fire during the Winter periods specified in the Calendar. If using a monthly Calendar, specifying Jan, Apr, July and Oct only, would only fire maintenance in those months, and so on.