Explanation:

Product development refers to the complete life cycle. This starts from market analysis to goes up to the final product launch. Product design is only a part of the cycle where the design of the product is created. Supervision.

The product developer supervises each stage of development.
With a product in the market, enhancements, expansions, and changes will be driven by user feedback via various channels. Over time the product roadmap will evolve based on this learning and the objectives the company sets for this product. This work never ends until it’s finally time to sunset a product at the end of its lifecycle.