It is different because it introduces the prototype product following the proposed marketing plan. This phase is necessary to confirm the concept and should be used to refine all parts of the product and marketing message. It is also a useful stage to start building 'hype' for the product and to get people interested. Commercialization – Once the final concept has been developed and tested, final decisions should be made about when the product launch. Marketing plans and costs for the product must be finalized. This should be discussed with the sales and distribution teams, so that the product is ready for launch. It may be worth considering updating any marketing adverts to keep the product in customers' minds and maintain the hype built up in the previous stage. The eight phases of product development are designed to save time and resources. New product development ideas and prototypes are tested to ensure that the new product meets customers' needs and wants. The commercialization phase is carefully planned to maximize the success of the product, a poor start will affect the sales of the product and could also affect the reputation and image of the new product. Finally, to learn from any mistakes made, a review of market trends is necessary to access success