This article is about the stages of a product life cycle. For Product life cycle from an engineering perspective, seeProduct life cycle management#Phases of product life cycle and corresponding technologies. For Product life-cycle from a marketing perspective, see Product life-cycle management#Product life-cycle.

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Product life cycle is a business technique that attempts to list the stages in the lifespan of commercial/consumer products. 'Product Life cycle' (PLC) is used for determining the lifespan of these products; such as the normal phases through which a product goes over its lifespan. A bi-product of this PLC information is Product Life cycle Management (PLM). This is the management of the gathered PLC data to use in different aspects of the business.