Which of the following are common use cases well-suited for subprocesses and start processes?

Subprocesses and start processes in Appian are particularly advantageous in scenarios involving integrations. When a process requires integrations, it's often necessary to encapsulate related activities that handle these integrations into a subprocess. This allows the system to manage the complexities associated with external system interactions more efficiently. For instance, if a process involves calling APIs to fetch data from other applications or services, using a subprocess can help organize these integration activities separately from the main flow, promoting modularity and reusability.

Integrating with external systems typically requires careful handling of errors, responses, and possibly varying workflows depending on the data retrieved. By leveraging subprocesses, developers can ensure a clear separation of these integration tasks from the overall process logic, making it easier to maintain and optimize.

The other scenarios mentioned (such as a business user starting the process, reusing steps across multiple models, or handling approvals from multiple users) may involve aspects of process design but do not specifically highlight the unique benefits brought by subprocesses and start processes as clearly as integrations do. While they are important considerations in process design, they do not emphasize the modularity and management of complexity that subprocesses provide in the context of integrations.