Implementation
Guide for R/3 Customizing (IMG) 
The IMG (Implementation Guide for R/3 Customizing)
- Lists all actions required for implementing the SAP System
- Helps you to control and document the implementation
Please note that the paper version of the IMG is shorter than the online version. In the online system, additional information is provided.
The SIMG_ALL structure is the library that contains all sections for implementing the various components (for example, Materials Management, Sales & Distribution, Financial Accounting).