Design review meetings are critical for the success of the product. At my old company whenever I held a design review meeting, I would send out all the materials a few weeks before the actual meeting. I would ask the recipients to review the material and give back comments within one week. Within 1.5 weeks, if I haven’t received any comments, I call and make sure they are ok with it. If they do have comments, I resolve them before the meeting. The meeting is just getting everyone in one room to go over the design one last time. It usually doesn’t take long. I bring up any comments that I received and how we resolved it. By this time, everyone is ready to sign off on the design. The design review meeting has always been the last step that ensures everyone is on board and all comments and concerns have been resolved.