BF-Availability check

Availability Check:
It determines if the desired delivery quantity can be met on requested delivery date.
ATP : it is the stock quantity which are not reserved and can be delivered to customer.
ATP = present stock + planned inward – planned outward.

Types of Availability check:
- Check against ATP quantity
- Check against Product allocation
- Check against planning


Different dates:
Order date : Date of order
Material available date: date on which material available for picking and packing
Transportation planning date: date from which transportation planning started
Loading date: date on which material is loaded in vehicle.
Goods issue date: date on which material is dispatched from the plant.
Delivery date: date on which customer receives the Goods at his premises.

Different Time:
Transit time – from goods issue to delivery date
Loading time – Loading date to goods issue date
Lead time for transportation planning – trans. Planning date to loading date
Pick/Pack time - from material available to loading date



During availability check system calculates all this time and dates into consideration.
First we assume that we are doing availability check without RLT.
Case – 1 confirmation on required delivery date. Here the main date is material availability date. How it is calculated? System first takes into account the requested delivery date than it searches for transit time and based on it, system determined goods issue date. From goods issue date it deducts loading time and accordingly it determines Loading date. After that it searches for Pick/Pack time and deduct it from the Loading date and it determine the Material availability Date.
Now the system will calculate whether the required quantity will be available or not. This it calculates from today’s stock + planned inward – planned outward.

Case – 2 Confirmation at a later date.
In the above first case system carried backward scheduling, but suppose the material is not available on the mentioned material availability date, then the system carryout Forward scheduling. Here system will first determine on which date the material will be available and accordingly it will determines other dates.

Case –3 Partial delivery
If it is allowed in customer master, than system will carryout partial deliveries based on material availability.

Availability Check with RLT:
RLT – Replenishment Lead time. It is the time required to produce or procure the material. Now suppose if we do availability check with RLT, than even material is not available on the availability date but the availability date is after the RLT, than the system will confirm the quantity. It will assume that we can produce or procure the materials per the RLT.

For delivery, delivery item category can be used to control whether an availability check takes place in delivery.
Configuration:
In MM
- Define MRP controllers and assign it in Material master
- Defines Floats(Schedule margin key) and assign it in material master.
In SD-BF for availability check with ATP logic
- Define checking Group
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- Define material block for other user. You can block other user to use this material while you are doing availability check. This is defined for checking group.
- Define checking group default value. Mat type + Plant = checking group FERT + C000 = 01
- Carryout control for availability check.
Define controls for checking group(availability check) + checking Rule(Predefined)
Like 01 Daily Req. + A SD Order or B SD Delivery.
Based on this combination you will define which stocks you will consider, which inward/outward movement you will consider and RLT time will be considered or not for determining material availability date.
- Define Procedure for Requirement class. Activate TOR and Avail. Check at Req. class level.
- Define procedure for each schedule line. Activate TOR and Avail. Check at sch. Line level.
- Determine procedure for each delivery item. Activate avail. Check for deli. item
- Checking rule for updating backorders. Plant + checking rule C000 + A
- Define default setting. Here you define for each sales area whether the system should pop up a window whenever there is a shortfall of material. The window will show the dates on which the material will be available. It will give option like Accept the Proposal, Onetime delivery, complete delivery.