Which shape indicates the start of flow processing within a flow rule?

The shape that indicates the start of flow processing within a flow rule is the Start shape.

In Pega, flow rules are critical for defining the process that an application follows, and the Start shape is specifically designed to mark the initiation point of that process. This shape signifies where the flow begins, allowing users to understand how the process is structured from its inception. The flow then follows various paths based on the actions defined by the subsequent shapes, facilitating decision-making and task assignments.

This clear demarcation is essential for flow visualization, helping both developers and business analysts comprehend the flow of activities. Understanding that the Start shape is the entry point to the flow is vital for anyone working within Pega, as it lays the groundwork for defining how tasks and processes should proceed. Other shapes, such as End, Decision, and Assignment shapes, serve different roles within the flow and do not indicate the starting point.