Which component is primarily used for robotic process automation in Appian?

The component primarily used for robotic process automation (RPA) in Appian is RPA itself. RPA in Appian allows organizations to automate repetitive and rule-based tasks through software robots, which can mimic human actions by interacting with applications and systems in the same way a person would. This enables greater efficiency and accuracy in executing these tasks, freeing human workers to focus on more strategic activities.

RPA is designed to work seamlessly within the Appian platform, integrating with other components to enhance automation workflows. For instance, RPA can be combined with business rules and integrations to create powerful automated processes that handle complex scenarios across various systems.

In contrast, business rules are used to define the logic and conditions that govern decision-making in processes, while integrations are interfacing mechanisms that connect Appian applications with external systems. AI services encompass machine learning and intelligence capabilities that can help in analyzing data and making predictions, which complements automation but is not focused specifically on robotic process automation. Thus, the clarity and specific functionality of RPA as a component make it the correct answer for this question.