How can I make the loading and unloading activities of the operator fence them by writing in a Global Table according to the activity that is doing. For example, if the activity of Operator1 is to load the unit of Queue1 and download it in Queue2. In the Global Table in the form of a bill list, writing the activities that the Operator1. According to the case, Load Queue1, Download Queue2, Load Queue1 and so on. This is a small example that annex.
If they have some ideas they are welcome.