Package design needs to be tested in a real world setting and not in a boardroom. The store and the particular category context is crucial.
Your packaging needs to perform in one of the toughest competitive environments. Everyday your package has to compete with 3,000 other packages in an average grocery aisle to be first seen and then purchased. Can you imagine reading a magazine with all of the ads on one page? It’s hard to stand out in this scenario. This is also true for packaging in the store.
Make sure to choose artwork, package type and shape accordingly.