What is the layers of product concept?

there are mainly four layers in product concept. they are

• core products: the core ingredients of the product i.e. the brand name , design, style color etc.
• formal product: this contains attributes, instructions, quality, packaging etc.
• augmented products: this contains the extra benefits given with the product like guarantees, warenties , customer complaint management etc.
• future product: products with customised designs with the futureistic approach of the company . this is done by auto mobile industry.