This presentation summarizes research by the Construction Industry Institute (CII) Research Team 320 on problematic engineering design deliverables. The research identified the 11 most problematic deliverables, their common defects and causes, leading and lagging metrics to measure quality, and two implementation tools - the Design Deliverable Quality Assessment tool and Completeness of Design Deliverable Checklist tool - to help improve deliverable quality. The tools can help project teams assess current quality, identify potential defects, and plan mitigation strategies for improved project performance.