Availability Check With or Without Replenishment Lead Time 
Use
In Customizing, you define whether the availability for a combination of checking group and checking rule is
checked
with or without the replenishment lead time. The replenishment lead time is the time necessary to provide a material either by in-house production or by external procurement:
- For external procurement, the replenishment lead time consists of the purchasing department processing time, planned delivery time, and goods receipt processing time - in the same way as for forward scheduling in MRP. The ATP check only includes the planned delivery time.
- For in-house production, the system checks whether the total lead time is maintained in the material master (MRP 2 view). This is the estimated production time for a material, including all production levels from raw material procurement to final assembly.
- If the total replenishment time is maintained then this is included in the ATP check.
- If only the in-house production time is maintained and not this total replenishment time, then the in-house production time is included in the ATP check.
- If the total replenishment time and the in-house production time are maintained, then the total replenishment lead time is included in the ATP check.
All times are specified in number of days. The only exception is the planned delivery time; this is specified in calendar days.
Features
You can choose whether or not the replenishment lead time is taken into consideration in the availability check:
- If the replenishment lead time is taken into consideration, it has the following consequences:
- The availability is checked only for requirements within the replenishment lead time. Requirements outside the replenishment lead time are considered to be available as the system assumes that these materials can be provided by planning within the replenishment lead time.
If you do not want to work with infinite quantities, you can use the
Availability Check Against Allocations.
- If a requirement cannot be covered by receipts, the end of the replenishment lead time is the earliest date that the material can be confirmed.
- If the replenishment lead time is not taken into consideration, the availability is checked for each requirement time without taking the replenishment lead time into consideration.