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Hi @Alina A3,

It looks like this question may be part of a homework assignment or academic project. The professors who assign simulation modeling exercises using FlexSim expect that the academic integrity of their assignments will be maintained. In addition, we are supportive of Honor Codes or Pledges that regulate the behavior surrounding academic assignments.

I recommend reading our best practices page on the subject, which includes some resources that you should find helpful as you use FlexSim for academic purposes. I also highly recommend Dr. Allen Greenwood’s FlexSim Primer, which was written specifically for students and professors.

By default the combiner will wait until the specified number of items have entered through each input port before the process time starts.

If you want to achieve something different, could you provide some more details? I don't understand where exactly you are having problems. Do the batches vary in size and you want to start the process regardless of the exact number?