Customizing Cross-System Tools control Customizing changes across several systems and clients in the R/3 System infrastructure.

Customizing Cross-System Tools:

• manage Customizing changes effectively
• distribute Customizing changes transparently
• checks and copies Customizing changes

A large number of people are involved in the development of a system, and transporting and testing changes, so you need to be able to trace and check changes exactly.

Customizing Cross-System Tools were developed to support this process.

The R/3 System infrastructure usually comprises at least three R/3 Systems. These are:

• Development system

• Quality assurance system

• Production system

Apart from the production system, each system can contain several clients. A client is a logical system, an organizational unit with its own data.

The quality assurance system usually has three customer-defined clients:

• quality assurance test client
• user training client
• Customizing and development production client

All infrastructure systems are linked by the Change and Transport System, which transports changes between the systems. Changes are usually transported from the development system via the quality assurance system into the production system.

The following graphic shows a typical scenario:

This scenario shows the relationships between the Customizing Cross-System Tools and other implementation tools.

Although Customizing Cross-System Tools are designed for interaction, you can also call them individually.

The most important tools are:

• Change log

• Computer Aided Test Tool (CATT)