How to execute process chain by event

1. Maintain start process with "Direct Scheduling"
2. Launch the PC using the program (SE38) "BTC_EVENT_RAISE" by enter the same value in the process chain
3. In case, this PC has to be execute in periodic job. At Program BTC_EVENT_RAISE, select "Program" --> "Execute in Background"
Note:
Start Using Meta Chain or API is used when we want to execute this PC when another PC is finish