How is availability check done.

[Former Member]

Hi All,

Please help me to resolve the below . The First Date is 23.04.2010. how is availability check done???? pleae dont give me the lecture notes . instead provide me more approx dates for the below.

In SO 5000008282 I need delivery dates as follows:-

Item 10

2UCP070686 x2 23.07.2010

2UCP070686 x5 09.07.2010 (SAP only allows 23.07.2010 at earliest)

Item 20

2ucp070688 x4 23.07.2010 (SAP only allows 26.07.2010 at earliest)

Item 30

2UCP070686 x1 06.08.2010 (This is OK in SAP)

Can you please look at the SO and MO setup and advise where our problem

is.

[ajitsingh6]

Dear,

First the system carries out backward scheduling and establishes the

material avaialbility date = desired delivery date-transit time-loading time-picking & packing time and on this date an availability check is carried out using ATP logic .

the configuration involves following

1. switching on at schedule line catagegory the avialability check and TOR

2. configure the avilability check using ATP and using the checking group and Checking rule

ATP Check is checking of availablty quantities i.e ATP = Total Warehouse Stock + Planned receipts(Incoming Stock) - Planned Issues (Out going stock)

[jpfriends079]

See, the system first prepares schedule line containing the information on the desired delivery date and quantities this information is passed to MRP and an availability check and transfer of requiremnts are executed-

First the system carries out backward scheduling and establishes the material avaialbility date desired delivery date-transit time-loading time-picking & packing time and on this date an availability check is carried out using ATP logic which means avialable to promise quanity total warehouse stock+incoming orders-outgoing orders

Along with Availability check the requirements are transferred to MRP.

the configuration involves following

1. switching on at schedule line category the availability check and TOR

2. configure the availability check using ATP and using the checking group and Checking rule

Also, check Replenishment lead time (RLT)

It is the time taken for the material to become available either internally (in house production) or externally (from a vendor). The most important things to consider during an external procurement are purchasing and MRP2 (procurement) views of MMR where the processing time for purchasing, planned delivery time and goods receipt processing time are taken into account. On the other hand internal procurement is based on in house production time (MRP 2 view) goods receipt processing time or alternatively RLT time, which is found on MRP 3 view.

RLT (Replenishment Lead Time) is the time taken for the material to become available. RLT is only used when doing an ATP check (Available To Promise). The value of RLT for a material is specified on material master record.

There are three types of availability checks u2013

• Check on basis of ATP quantities.

• Check against product allocation.

• Check against planning.

Hope this can assist you.

Thanks & Regards

JP