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A contrived example of how this might work:
Flower Flour and Yeast are products that have made their way from their producer's to Bob's bake shop. As those products have made their way to Bob's shelves EPCIS events have been created right up until Bob has flower flour and yeast. The Bob takes that flower flour and yeast and makes some bread to offer for sale in his bake shop. This process emits EPCIS events showing how these products (by lot ideally) are used/transformed as ingredients in Bob's bread for sale to customers. As customers buy this bread, further EPCIS events are issued showing the sale, and if these customers were retail locations that used this bread in a sale or recipe for sandwiches we'd have further EPCIS events that when put together across all the various actors will allow us to trace exactly where/when/who produced the bread, where it went in between and even who ended up with it or a product made from it in the end.
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