Time Fence Rule
This field applies to APS.
On the Planning Detail APS form, this field is read-only.
Other than on the Planning Detal APS form, select a rule to control when demands for this item can use available supplies or inventory. This control allows you to preserve a quantity for use by shorter-term demands. Demands due later than the time fence cannot consume available inventory and supplies to the point where the on-hand and supply quantities drop below a certain "preservation level" (which is based on the item's Safety Stock level). You can adjust the preservation level using the Preservation Level Multiplier field.
NOTE: If either the Safety Stock or Preservation Level Multiplier value is zero, the entire quantity of inventory and supplies is preserved inside the time fence. That is, demands due later than the time fence cannot consume any inventory or supplies inside the time fence.
The time fence time you define should represent the amount of time that is typically needed to replenish this item's quantity up to the (Safety Stock * Preservation Level Multiplier) value.
Available rules are:
- No time fence: the time fence function is disabled.
- Lead Time: the length of the time fence is defined by the end item's lead time (Fixed Lead Time + (Variable Lead Time * order quantity)). If a PCAL shift is defined, the system calculates lead time according to that shift. Otherwise, it calculates lead time using 24 hours x 7 days a week. Select this option if the time to replenish this item's quantity should be represented only by the end item lead time.
- Accumulated Lead Time: the length of the time fence is defined by the accumulated lead time for the end item + the lead times for all of its component items. If a PCAL shift is defined, the system calculates lead time according to that shift. Otherwise, it calculates lead time using 24 hours x 7 days a week. Select this option if the time to replenish this item's quantity should include the lead times of all the components (that is, the components may not typically be available).
- Specific Value: the length of the time fence is defined by the value in the Time Fence Value field (in days). The system calculates lead time using 24 hours x 7 days a week.
CAUTION: The Manufacturing Safety Stock logic uses only Lead Time or Accumulated Lead Time rules. Caution should be used when choosing the Specific rule for Time Fence Rule.
See Preserving Inventory and Supplies for Short-Term Demands for more information about time fences.