AnyLogic: free specific agents from wait block

Question

I have equipped my agent with a parameter barcode. Input is an Excel with different barcodes as arrival in the source.

There are four different types of parts in my model. Part 1 is multiplied in the model by a split block w times, part 2 x times, part 3 y times and part 4 z times.

The parts run different paths through my model. That means they have different times and therefore do not arrive back in the sink at the same time. Because I want all parts to end up in the sink at the same time, I want to work with a wait block.

When the parts are multiplied, they keep their unique barcode.

Example: Part 3 is multiplied y times. So there are y many part 1 with the same barcode. So in the wait block I want all agents (parts) to wait until ALL multiplied parts of this part arrive in the wait block just before the sink.

My approach is: a switch case within the wait block after Part 1, Part 2 ect. And then inside the case a code like: if w agents with the same barcode are inside the wait block, free them. But not all other agents. So you could say that this wait block is like a sorting station.

Answer 1

I would approach this differently. Instead of Wait block, I would keep it as Queue. Then join it to a Pickup block. Inside Pickup, select While condition is true and type below the condition (assuming your total number should be 7) (agent.barcode==container.barcode) && (count(queue, q-> q.barcode==agent.barcode)==7 ) .

Whenever a new barcode enters the system, create a dummy agent with agent.barcode set to that value and send the dummy agent to enter1 with code like enter1.take(agent). Then this dummy agent will wait in queue2, once the count is reached, it will pick up exactly that number of agents and depart to sink. If you want, you can put a Dropoff block and then Sink.