What must happen to Activity Class Parameter values in order to use the data in later nodes within the process?

For data from Activity Class Parameter values to be available for use in later nodes within the process, it is essential that they are stored in a process variable. This is because process variables act as a mechanism to retain values across the various nodes of a process, enabling continuity of data and functionality throughout the execution of that process.

By storing these values in a process variable, they become accessible wherever needed within the process flow, allowing for dynamic updates and interactions based on the data generated from earlier activities. This mechanism ensures that the information can be referenced later on without any loss, facilitating smooth operations and data integrity as the process proceeds through its various stages.

In contrast, manually entering values each time is inefficient and error-prone. Disregarding values after their initial use would lead to a significant loss of useful data that could enhance decision-making in later steps of the process. Similarly, not saving values at all would preclude their availability for future reference, defeating the purpose of capturing data for reuse within the process. Thus, the necessity of storing values in a process variable is vital for maintaining data flow and ensuring the seamless functioning of a process in Appian.