Abstract: A method and apparatus for debugging a program of a business process, the method comprising: displaying a flowchart of the process on a display, said displaying being enabled by one or more plug-ins; enabling setting of a debugging breakpoint in the displayed flowchart of the process of the program; operating a simulator for creating a simulated runtime environment for executing the program as if the program is operating in actual application; executing the program using the simulator; continuously communicating status of the executing program from the simulator to one of the plug-ins; determining at one of the plug-ins whether the status of the executing program has reached the breakpoint set in the displayed flowchart of the process of the program; and suspending execution of the program when the plug-in determines that the status of the executing program has reached the breakpoint set in the displayed flowchart of the process of the program.