Checking Groups and Checking Rules

Explain the definition of the checking groups (CG) and checking rules (CR) in the availability check in the customizing of the Production orders.

This is about CR and CG : 

CG : Specifies whether and how the system checks availability and generates requirements in material planning.  The value you enter for use  is a default value which defines:

Which MRP elements (for example, purchase orders, reservations) the system includes in the availability check.

Whether the system checks availability only until the end of the planning or whether it checks availability over the entire period for which MRP elements exist.

Whether the system generates individual requirements or summarized requirements if you enter sales orders or deliveries for the material.

CR : Defines the checking procedure to be used for the availability check (or in Inventory Management, the missing parts check) in individual applications.

Overall you can say, checking rule and group to determine:

Which receipts (for example, purchase orders or production orders) should be taken into account in the availability check.

Which issues (for example, sales orders or dependent requirements) should be taken into account in the availability check.

Path : SPRO-----Shop floor control---Availability check-Define CG/CR
 

I have created a process order-1, and assigned say a raw material x of certain batch.  Material x got reserved for that process order.  Now my requirement is system should not allow the material x of the same batch to assign for another process order-2, since it got reserved for process order-1. Availibility check for the material X has given 01 in material master. 

To solve the problem:

Go in OPJK and check the checking rule for your plant and order type.
Default - It will be pp checking rule.

Go in OPJJ and check your setting against reservation and change it with do not check.

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