In the context of SAP systems, Side-by-Side Extensibility refers to the type of extensions that are loosely coupled. This approach leverages the SAP Cloud Platform to create and run extensions independent of the core SAP system. It provides a high degree of flexibility and agility, allowing businesses to develop and deploy enhancements without impacting the underlying core software. This method is particularly advantageous for maintaining system integrity and ease of upgrades.References= SAP documentation on system extensibility

In RISE with SAP S/4HANA Cloud, private edition, key-user in-app extensions allow for significant customization within the provided framework to meet specific business needs. Two such capabilities are defining custom tables through the Custom Business Objects SAP Fiori app, which enables users to create and manage their own database tables within the system, and creating custom application UIs with UI Adaptation at Runtime, which allows for modifications to the user interface of applications directly in the live system without traditional development processes.References= These features are outlined in the official SAP documentation for SAP S/4HANA Cloud, private edition, which describes the scope and capabilities of in-app extensions available to key users.

Defining a customer-specific organizational structure involves several critical activities. One key step is using transaction SPRO and the SAP Reference IMG (Implementation Guide), which provides the necessary tools for configuring all parts of the system according to the organization's needs. Additionally, creating a new company code for the relevant country is essential to tailor the system for local legal and business requirements, reflecting the organizational structure specific to that market.References= SAP ERP configuration documentation