Himang,

I don’t have personal experience with design review meetings however; I have a friend who has some experience in such meetings. The design review process itself could happen in stages. As you mentioned, a design review could last hours to weeks depending on the complexity of the project and interests of the stakeholders involved. A good design review lasting only hours with all parties in agreement means the design was well formulated and presented to the team, management, and customer with only a few minor pieces of feedback for improvement. A poor design review at the end of a stage of a product could last weeks if the design did not meet expectations or requirements and involves stakeholders who wish to add to the design rather than stick to what was presented.