A technical writer’s main role is writing technical documents, but they do don a lot many hats, as shown in the image below. Thus, the writer’s “supporting actor” role definitely makes the world of a difference to the product and its documentation.
Technical reviews are vital for effective and quality documentation. To make this happen, have documentation and its reviews listed as one of the deliverables – just like development or testing. This will place priority on the process, and ensure everyone involved understands the importance of proper and thorough reviews.