Package design must meet five groups of functional criteria: in-home, in-store (or warehouse), production, distribution and safety, and legal. In-home requirements usually dictate that packaging be easy to use and store, remind users when and what to repurchase, reinforce consumers' expectations of the product, and tell them how to safely and effectively use the product. In addition, increasing numbers of consumers expect packaging to be recyclable and environmentally sensitive.
In-store criteria require that packaging attracts attention on the shelf, instill confidence in the buyer, identify the product or brand and differentiate it from the competition, communicate benefits and uses, and entice customers to actually purchase the item. The product must also be easy for retailers to store and stock on the shelves or the floor, and simple to process at a check-out counter or other final point of distribution. For instance, packaging that is oddly shaped and takes up a large amount of space may draw attention, but it may also be shunned by mail-order sellers concerned about shipping costs or space-conscious store retailers.
Production demands, the third group of functional criteria influencing packaging, are primarily based on cost. A designer may create a fantastic package that would perform excellently in the marketplace, but if the company can't find a way to produce the package cost-effectively, the design is useless. Among the most important considerations is production line speed. If a container is too long, wide, or short, it could significantly slow the speed of the production machines. Or, if the top or spout of a container is too small or is oddly shaped, the product may not flow easily into the package.
Packaging considerations related to distribution and safety are important and numerous. If an unacceptable portion of the goods are damaged during storage, transportation, or distribution, the package has failed. Likewise, if the