What needs to be altered if complex data logic or data access control is required in an Insight App?

When complex data logic or data access control is necessary in an Insight App, the underlying data models must be altered. This is because data models serve as the foundation for how data is structured, accessed, and used within the application. They define the relationships between data elements, apply data transformations, and enforce any business rules, which are crucial for implementing complex logic.

By modifying the underlying data models, you can ensure that the app adheres to specific data access controls, potentially limiting which users can view or interact with certain data based on predefined conditions. This alteration could involve changing calculations, aggregations, or even adding new data relationships to facilitate the required complexity in data handling.

In contrast, visualization layouts, user interface elements, and external data sources would not inherently provide the necessary data processing capabilities needed for advanced logic or access control. While these components are essential for the overall presentation and interaction of the app, they depend on the underlying data models to function correctly in presenting and managing complex datasets. Therefore, focusing on the underlying data models proves to be the integral step in addressing the needs of sophisticated data scenarios in an Insight App.