The level of detail that the business analyst should use for the process map and why is somewhat detailed.
This is because the process map should provide enough information to guide new users through the onboarding process, but not overwhelm them with too much detail that may be irrelevant or unnecessary.
Since the process will be repetitive, new users will learn and remember the details over time, and they can always refer back to the process map if needed. The process map should include the main steps, decisions, inputs, outputs, and roles involved in the onboarding process, as well as any exceptions or variations. The process map should also use clear and consistent terminology, symbols, and notation to ensure readability and understanding. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/business-pro