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Availability checking in SAP 

ATP

ATP is simply Available to promise...quantity which we can promise to the current object. Object may be a sales

order/delivery or production order. Here I would like to give simple steps to understand the availability checking in SAP. I

would like to give a general guide lines to availability checkAvailability check is carried out in different transactions like Sales

order creation, delivery creation, Purchase order creation, goods issue and also in production order.The point to be noted

here is every where the availability check is carried out using two basic elements.

1. Checking rule

2. Checking group

Now let us understand these two important elements.

Checking Rule

Checking rule is transaction based, i.e. In STD SAP system, if you are creating the sales order, then it is A, if delivery then it

is B, if you are creating/releasing production order, then it is PP. This is almost fixed. What is the use of this...as a single

element it does not have any meaning, but with checking group.

Checking group

Checking group is the one what you assign in material master at plant level, i.e. for different plant and for the same material

or for same plant different material there can be a different checking group. This is assigned in material master in MRP3

view, as a signal element it may not have much meaning except that it may be used for checking at which level - group level

or individual level and quantities confirmed in the availability check are to be locked or not.

Combinationof Checkingrule and checkinggroupwill definethe scopeof check

Scopeof check-

what is scope of check? here we define what type of stock, which receipt element and issue element has to be taken to

decide the quantity to be declared as available for use.

Typeof check- There are many types of stocks available in SAP and to be considered/not to be considered in availability

check.Safety stock, stock in transfer, Quality inspection stock, blocked stock, restricted stock, w/o subcontract stock. -

activate check box if you want to consider the any of the stock

Replenishmentleadtime- CheckwithoutRTL= Replenishment lead time is the time taken to receive the stock once order is

placed with vendor. Here you are informing the system whether you want to consider the date in future(after RTL) if the any

of the above stock is not available...Don't activate the check box if you want the system to check RTL time so that qty is

confirmed after RTL date.

Storagelocationcheck- No storagelocationinspection- Here if you activate the check box, then system will check the stock at

plant level instead of storage location level. Hence if you want the system is to check stock at storage location level, then

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don't activate this check box. The determination of stock is a another loop which depends on storage condition loading group

or simply at the storage location maintained in the transaction concerned.

Missingparts processing- CheckingperiodGR- Here we maintain a period so that missing parts MRP controller will be notified if

GR is done till the period you mentioned here and the material is considered as a missing parts.

Receipt/issues- Here we informing the system which receipt and which issue elements to be considered for calculating ATP.

Let us check one by one in more detail. Depending on the situation the elements can be receipt and/or issue.

Include purchase order - This is a receipt element if the you consider a raw material, i.e. it is confirmed receipt element. It

can be a STO PO. Hence system will consider this receipt to calculate the ATP qty.

Include PR - Same as the above, difference is, this may not be a confirmed receipt/issue.

Include dependent requirement - Dependent requirement is the requirement from a confirmed planned order/sub contract

PR, created automatically in MRP, hence it is a planned issue. If you activate this check box, system will consider all the

dependent requirement which are already planned before giving you the ATP qty.

Include reservations - These are can be the materials reservations(not dependent on any other elements like production

order) which are created manually in the system using a movements, hence this can be a issue or receipt depending on

which movement type is used to create a reservation.

Include sales requirement / Include deliveries - If you activate this check box, system will consider the sales orders/deliveries

which already committed, hence it is a confirmed issue.

Include shipping notification - Shipping notification is the information of arrival of material, hence like PO in a receiving plant

and is a confirmed receipt

Include dependent reservation - Dependent reservation is the requirement from a production order/process order/sub

contract PO, created automatically during order creation, hence it is a confirmed issue. If you activate this check box, system

will consider all the dependent reservations which are already confirmed before giving you the ATP qty. Some more

functionality given here is which reservation is to be checked Do not check i.e. system will not consider this as requirement

while confirming the ATP qty

Do not check - donot take this requirement.

X Include all reservations - include all the reservation from production order(created/released)

A Only include withdraw able reservations - Include only reservation from a production order that is released.

Include released order requirement - Specifies whether the system takes requirements resulting from stock transport orders

and stock transport requisitions into account during the availability check. It is a confirmed (from STO-PO) or planned

requirement (from PR) Do not check - requirements from STO not to be considered as a requirement in supplying plant

Do not check - donot check it as a requirement

X Check releases for stock transport orders and requisitions-Check all the requirement from STO-PR, STO-PO in supplying

plant

A Check releases for stock transport orders only - Check all the requirement from only STO-PR in supplying plant.

Include Planned order -Indicates whether the system takes planned into account during the availability check as a receipt. It

can be confirmed or planned issue depending on planned order is firmed or not firmed.

Do not check - don't check any planned order as a receipt

X Check all planned orders - take all the planned orders in to account

A Check firmed planned orders only- take only firmed planned orders in to account

B Only check planned orders that are completely confirmed- I have not seen any difference between A and B.

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Include Production order - Include production orders as a receipt element for calculation of ATP, which are the status to be

considered is given below

Do not take into account - Don't take Production order as a receipt element

X Take all production orders into account - take all the production orders

F Only take released production orders into account - take only the released production orders as receipt. 

Include receipt from past and future - When confirming sales order which are the receipt to be considered is discussed

above but whether to take future and / or past receipt...option is given below

Include receipts from past and future

A Include receipts from past and future, with messages

B Include future receipts only

C Include future receipts only, with a message