FFS - How to simulate a crane?

Hi all, I wish to simulate in FFS the behavior of a crane used to load/unload parts onto/from N machines; the real crane is equipped with a double gripper, hence during each mission it unloads the finished part and then loads the raw one.
What is the best approach you suggest to use for such a model? Are AGVs the most suitable resources to use? Or perhaps workers?
Thank you, Alessandro