What happens if multiple properties are watched in a Declare OnChange rule, with more than one changing?

In the context of a Declare OnChange rule in Pega, when multiple properties are being monitored, only one activity execution occurs regardless of how many of those properties are changed. This is because the Declare OnChange rule is designed to optimize performance by reducing unnecessary processing. If several properties are modified simultaneously, the ruleset will trigger only one execution of the activity associated with the Declare OnChange rule, thus ensuring that the system operates efficiently without duplicating effort for multiple changes.

This behavior is particularly beneficial in scenarios where properties may be interrelated or if the changes influence the same overall outcome; it prevents redundant executions and promotes a more streamlined processing flow. In this way, the architecture keeps the application responsive and resource-efficient by managing triggers and executions effectively.