Which of the following is not a phase of the product life cycle?

The growth phase is a critical component of the product life cycle, occurring after the introduction stage. During this phase, product sales increase rapidly as market acceptance grows, leading to higher revenues and the potential for increased profits. This phase is characterized by the expansion of market reach and often involves scaling production and marketing efforts.

The concept phase, while sometimes referred to in discussions about product development, relates to the initial stage of developing a product idea rather than a formal phase of the product life cycle. This phase focuses on market research, idea generation, and feasibility studies, which precede the actual introduction of a product into the market.

Planning is an essential activity that occurs prior to the product life cycle phases, particularly during the concept and introduction stages. It involves strategizing for product development, marketing approaches, and overall business objectives. However, it does not constitute a separate phase in the product life cycle itself.