Guidelines for Using Lead Time Mode

Consider these points when you use lead time promising.

Promising uses a simple calculation to determine the promise date.

Requested date from the sales plus the lead time that you specify on your ATP rule equals the promise date

Promising uses the value in the Requested Date on the fulfillment line to determine the promise date:

If the Requested Date Contains	Then Promising
Ship Date	Adds the lead time from your ATP rule to the requested date. Adds the number of holidays from the calendar to the promise date. For example, if the calendar has one holiday between today and the requested date, then Promising adds one day to the promise date. Promising doesn't determine whether the item is available.
Arrival Date	Calculates the requested ship date. To do this, it uses the default carrier, shipping mode, and service level that you use to ship the item during the ship-from date and the ship-to date. This is your transit time. It adds the transit time to the ship date. To determine the promise date, it adds the lead time that you specify on your ATP rule to the requested ship date. Adds the number of holidays from the calendar to the promise date.

If the Requested Date Contains

Then Promising

Ship Date

Adds the lead time from your ATP rule to the requested date.
Adds the number of holidays from the calendar to the promise date. For example, if the calendar has one holiday between today and the requested date, then Promising adds one day to the promise date.

Promising doesn't determine whether the item is available.

Arrival Date

Calculates the requested ship date. To do this, it uses the default carrier, shipping mode, and service level that you use to ship the item during the ship-from date and the ship-to date. This is your transit time. It adds the transit time to the ship date.
To determine the promise date, it adds the lead time that you specify on your ATP rule to the requested ship date.
Adds the number of holidays from the calendar to the promise date.

Promising includes holidays from the calendar for ship date or arrival date. For example, if there's one holiday between today and the requested date, then Promising adds one day to the promise date.

Specify What Kind of Lead Time to Use

Set the Lead Time Considered attribute when you create your ATP rule.

Lead Time Considered	Description
Total	The time that you need to procure or manufacture the item. If you manufacture an assembly, the total lead time is the time that you need to manufacture the item from its manufacturing components on the primary route, assuming these components are infinitely available.
Cumulative Manufacturing	The total amount of time you need to manufacture the item, assuming the raw material and manufacturing components aren't available. Promising adds the manufacturing time from the primary route for the item to the times for each of the item's subassemblies.
Cumulative Total	The total amount of time that you need to assemble the item plus the largest, adjusted cumulative lead time from the item's manufacturing components. For example, if the time is 1 day for component x, and 2 days for y, then Promising uses y's lead time.
User Defined	Create your own! If you select this value, then you can enter your own lead time in the User-Defined Lead Time in Days attribute.