Availability check – Materials Management

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Availability check – Materials Management (MM)

Availble stock check that is run automatically after each goods movement and which is intended to prevent the book inventory balances of physical stock categories (such as unrestricted-use stock) from becoming negative. The Availability check field in the material master is used to control on how the availability check is carried in SAP system.

There are 2 types of availability check:

1. Availability check for the various stock types in Inventory Management. This checking is carried out automatically and cannot be manually set in the system.

2. Check for the available stocks in Materials Requirement Planning (MRP). The available stocks check in MRP is activated in the material master record by defining “Availability check” field in material master in MRP3 view. This checking can be configured in Customizing for MRP.

Checking Availability of Stock Types

Different stocks in different stock types are checked. It is depending on the movement type:

• In the case of a withdrawal for consumption, unrestricted-use stock is checked.

• In the case of a release from stock in quality inspection, quality inspection stock is checked.

• In the case of consumption of consignment material, consignment stock for unrestricted use is checked.

If you find the issue that the unrestricted-use stock is not equal to available stock in Availability Overview(CO09) or Stock / Requirement List (MD04). It is because the configuration of availability checking in system.

Available Stock in Availability Overview

In Availability Overview (CO09), available QTY calculation is defined in OVZ9 transaction (Availability check control). The availability check is defined in the material master in MRP3 view. (OVZ2 – Checking groups)

Availability check control – OVZ9

Available Stock in Stock / Requirement List

In Stock / Requirement List (MD04), SAP system calculates plant stock. For all storage locations which belong to this plant and which are not excluded from materials planning or are planned separately. The following stocks are grouped together to calculate the plant stock:

• Unrestricted-use stock (UR)

• Stock in quality inspection (QI)

• Unrestricted-use consignment stock

• Consignment warehouse stock in quality inspection

However, you can design whether stock in transfer, blocked stock and restricted-use stock are included in the plant in Customizing for MRP in the IMG activity Availability of Stock in Transfer/Blocked Stock/Restricted Stock (OMI8 – Plant Parameters for Materials Requirement Planning)

What is Checking Rule in OVZ9?

In Available Check Control configuration (OVZ9), you will find Checking Rule information. Checking rule is predifined in SAP system. It is not material specific but it is transaction specific. Also alone checking rule is nothing, checking rule must be assigned to the specific checking group.

Checking Rule Determination – OMCP:

Checking Rule Determination

SPRO → Materials Management → Inventory Management and Physical Inventory → Goods Issue / Transfer Postings Set Up → Dynamic Availability Check → Transaction Code

Checking Rule “A” for Sales Order and “B” for Delivery is pre defined in SAP and based on the availability check which maintained in material master, for example “01″. The checking rule will reflect in sales order then. When sales order is created, system will take the combination “A/01″ as the scope of available check always.