Diagnosis
The system could not find a valid checking rule or a checking group forthe availability check.

System Response
If you want the system to carry out the availability check, you mustmaintain the following two parameters:

• checking rule in Customizing


• checking group in the material master record

The checking rule controls which requirement and receiptelements the system uses to carry out the availability check andwhether the replenishment lead time is taken account in thiscalculation or not. The various departments (sales and distribution,requirements planning, production order management, inventorymanagement) can define different rules for the availability calculationusing the different checking rules. The checking rules of theindividual departments are assigned to the checking groups inCustomizing. If the availability check is to be carried out for aparticular material, you assign the checking group to thismaterial in the material master record. The system finds the validchecking rule(s) for each department using the checking group.

Procedure
Proceed as follows:


• In Customizing for MRP (or SD, production control, or inventory
management) make sure that a checking rule has been assigned for aparticular plant or an MRP group. (In Customizing for MRP, you find thechecking rule as follows: Procurement proposals -> Defineavailability check for components.

• If necessary, assign a checking rule to the appropriate plant or to the
MRP group used to plan the material.

Hinweis
For more information on the availability check in MRP, please refer tothe chapter in the implementation guide: "Define availability check forcomponents".


• Check whether a checking group has been maintained in the material
master record for the component (either the MRP 2 screen or Sales/PlantData, field, Availability check).
If necessary, maintain the checking group.
If no availability check can be carried out, assign the checking group"no availability check" in the material master record.