What is the primary purpose of classes in application design?

The primary purpose of classes in application design is to organize a set of rules into a hierarchy. This hierarchical organization allows for better management and reuse of rules within the system. Classes serve as foundational structures where different rules can be defined, inherited, and overridden, enabling a clear and organized approach to design that enhances maintainability and scalability.

By establishing a hierarchy of classes, developers can categorize rules logically, which facilitates the application’s ability to determine which rules apply under various conditions. This organization is crucial in complex applications where numerous rules govern different aspects of business processes. The inheritance feature intrinsic to class hierarchy allows for shared behaviors and attributes, reducing redundancy and simplifying the development process.

While encapsulating business logic, data storage, and enhancing the user interface are important aspects of application design, they do not capture the fundamental role that class organization and hierarchy play in the overall architecture of a Pega application. Classes primarily focus on structuring rules and promoting reuse, rather than directly managing logic, storing data, or improving user interfaces.