A system for enabling a developer to concurrently debug parallel activities in a business process or workflow, or other software process. A production server includes a business process, which includes a parallel activity. The production server is operable to receive a request to debug the business process, present a graphical representation of the business process, receive input which indicates where a breakpoint is to be added to the business process, and insert the breakpoint. When a request to debug the business process is received, the production server instantiates the business process and executes the instance, and pauses execution of the instance when a breakpoint is reached and enters debug mode. It can then receive an instruction to perform a parallel-step operation on the parallel activity, execute a plurality of current activities in the parallel activity concurrently, and pause execution before executing a next activity and waits for further input.