Any discussion on the shelf life of ice cream would do well to include planned variants with added inclusions. Often shelf-life studies cover only straight vanilla or chocolate, then other added flavors as part of any final product line.
Shelf life for the entire line might be considered for products with inclusions. All products within the product line are assigned the same shelf life, which adds some degree of inherent error. End of shelf life is determined by the feature, or fact, that fails first. In many instances, products with inclusions tend to fail first.