Select the method that master scheduling uses to calculate requirements for the item. The following options are available: ...

Select the method that master scheduling uses to calculate requirements for the item. The following options are available: Period (when demand brings the projected inventory for the period below the specified minimum quantity, a planned order is generated to fulfill all demands that occur in the period that is specified in the Coverage period field; the period starts on the date of the first requirement, and the planned order is generated on this date), Requirement (a planned order is generated to fulfill every requirement that brings inventory below the minimum quantity), Min./Max. (when demand brings the projected inventory below the specified minimum quantity, a planned order is generated to bring inventory up to the specified maximum quantity; when you use this method, items that are physically reserved are not included when requirements are calculated), and Manual (master scheduling does not calculate requirements or generate planned orders for the item; the item is assumed to be manually planned; this method is best used for items that are easy to buy, and for items that are managed by visual inspection).