This key determines which conditions are valid for quality management in procurement.

If you activate the indicator for QM in procurement in the material master record at the client level , you must also store a control key at the plant level for quality management in procurement.

Depending on the control indicators in the control key, you may have to maintain additional data.

SAP transaction code to maintain the Control key SM30 - V_TQ08

You can set the Message Control for Lock as :

I    - Information 
W - Warming
E   - Defects

You can also indicate that a Quality Certificate is required or not.

QM Material Setup
QM Workflow For Material Setup

SAP QM Books
SAP Quality Management Certification, Interview Questions and Configuration Reference Books

SAP QM Tips
SAP QM Tips and Quality Management

Main Index
SAP ERP Modules, Basis, ABAP and Other IMG Stuff