How to write a business process?

Question

block diagram

There is some business process. It describes the behavior of some object (person ) A. For example, he did this, and then this, and then he went there. Etc.
This object interacts with a certain system that has forms, buttons, controls.
How to correctly display the interaction of object A with the system on the business process diagram? For example, filling out a card, saving a result, closing a form, etc.
I am using Visio.

Answer 1

On the BP diagram - no way, there indicate only the purpose of this function and the executor, for example "The operator performs an accounting operation in 1C." To display the states of objects or scenarios, you can look towards UML diagrams.

Answer 2

google PBsimulator