DiogoRamos

I modeled a brewery where customers enter, get "combined" with a beer (with a combiner) and go on...there is also a worker serving them (by bringing the beer to the costumers from another server connected to a source). I would like to know what I could do to make the worker only go to the combiner if there's at least one customer there (selection condition doesn't work because if the value is false once, it'll always be false) and if there isn't, he would just stand by the server.