Detailed, fabrication-ready drawings produced by a subcontractor, fabricator, or manufacturer - showing exactly how a component will be built or installed, at a level of precision the design team's own drawings do not attempt. In a BIM workflow, shop drawings are increasingly generated directly from the model rather than redrawn from scratch, once the model reaches LOD 400.
Shop drawings usually require formal approval from the design team before fabrication starts, which is exactly the kind of milestone tracked through a project's issue tracking and review workflow - an unapproved shop drawing that gets fabricated anyway is a common, expensive mistake on a poorly coordinated project.