Lead-times are portions of the span of time from recognizing the need for an order to receiving the goods to inventory.

The planning time fence defines a time period within which the planning engine may not create planned orders. Use planning time fence control for schedule stability during the initial periods of a plan.

The more realistic that your lead-times are, the more accurate the plan matches what will actually occur during execution. Use planning time fence control for schedule stability during the initial periods of a plan.