TESTING in SAP is usually done by use of test scripts. These are sequences of instructions which follow business processes. They can be used by configuration, support and end users. 

New configuration in SAP is usually done in a Development client. After the configuration is COMPLETED it will be tested in that client by the configuration and/or support team. When they are SATISFIED the config is working correctly they will transport the new settings to a QUALITY Assurance client. There, any client-specific configuration is added and then the tests are run again. When the config/support team are satisfied they will have the tests run by end users. The end users are more likely to spot any procedures that don't meet the usual business requirements but these might be deliberate, EITHER as improvements or to meet the requirements of operating with SAP.

Testing in SAP is usually done by use of test scripts. These are sequences of instructions which follow business processes. They can be used by configuration, support and end users. 

New configuration in SAP is usually done in a Development client. After the configuration is completed it will be tested in that client by the configuration and/or support team. When they are satisfied the config is working correctly they will transport the new settings to a Quality Assurance client. There, any client-specific configuration is added and then the tests are run again. When the config/support team are satisfied they will have the tests run by end users. The end users are more likely to spot any procedures that don't meet the usual business requirements but these might be deliberate, either as improvements or to meet the requirements of operating with SAP.